21214210103131 has 4 divisors (see below), whose sum is σ = 22330747477000. Its totient is φ = 20097672729264.

The previous prime is 21214210103111. The next prime is 21214210103221. The reversal of 21214210103131 is 13130101241212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214210103131 is a prime.

It is a super-2 number, since 2×21214210103131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214210103111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 558268686906 + ... + 558268686943.

It is an arithmetic number, because the mean of its divisors is an integer number (5582686869250).

Almost surely, 2^{21214210103131} is an apocalyptic number.

21214210103131 is a deficient number, since it is larger than the sum of its proper divisors (1116537373869).

21214210103131 is a wasteful number, since it uses less digits than its factorization.

21214210103131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116537373868.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21214210103131 its reverse (13130101241212), we get a palindrome (34344311344343).

The spelling of 21214210103131 in words is "twenty-one trillion, two hundred fourteen billion, two hundred ten million, one hundred three thousand, one hundred thirty-one".