21201103222131 has 8 divisors (see below), whose sum is σ = 32306443005184. Its totient is φ = 12114916126920.

The previous prime is 21201103222051. The next prime is 21201103222151. The reversal of 21201103222131 is 13122230110212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21201103222131 - 2¹¹ = 21201103220083 is a prime.

It is a super-2 number, since 2×21201103222131² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1009576343911 = 21201103222131 / (2 + 1 + 2 + 0 + 1 + 1 + 0 + 3 + 2 + 2 + 2 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201103222098 and 21201103222107.

It is not an unprimeable number, because it can be changed into a prime (21201103222151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504788171935 + ... + 504788171976.

It is an arithmetic number, because the mean of its divisors is an integer number (4038305375648).

Almost surely, 2^{21201103222131} is an apocalyptic number.

21201103222131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21201103222131 is a deficient number, since it is larger than the sum of its proper divisors (11105339783053).

21201103222131 is a wasteful number, since it uses less digits than its factorization.

21201103222131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009576343921.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21201103222131 its reverse (13122230110212), we get a palindrome (34323333332343).

The spelling of 21201103222131 in words is "twenty-one trillion, two hundred one billion, one hundred three million, two hundred twenty-two thousand, one hundred thirty-one".