21213310032131 has 4 divisors (see below), whose sum is σ = 24243782893872. Its totient is φ = 18182837170392.

The previous prime is 21213310032071. The next prime is 21213310032151. The reversal of 21213310032131 is 13123001331212.

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

It is a cyclic number.

It is not a de Polignac number, because 21213310032131 - 2³⁴ = 21196130162947 is a prime.

It is a super-2 number, since 2×21213310032131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21213310032097 and 21213310032106.

It is not an unprimeable number, because it can be changed into a prime (21213310032151) 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, 1515236430860 + ... + 1515236430873.

It is an arithmetic number, because the mean of its divisors is an integer number (6060945723468).

Almost surely, 2^{21213310032131} is an apocalyptic number.

21213310032131 is a deficient number, since it is larger than the sum of its proper divisors (3030472861741).

21213310032131 is an equidigital number, since it uses as much as digits as its factorization.

21213310032131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030472861740.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21213310032131 its reverse (13123001331212), we get a palindrome (34336311363343).

The spelling of 21213310032131 in words is "twenty-one trillion, two hundred thirteen billion, three hundred ten million, thirty-two thousand, one hundred thirty-one".