21220102013231 has 12 divisors (see below), whose sum is σ = 23366450373336. Its totient is φ = 19256368013520.

The previous prime is 21220102013219. The next prime is 21220102013269. The reversal of 21220102013231 is 13231020102212.

It is a de Polignac number, because none of the positive numbers 2^k-21220102013231 is a prime.

It is a super-2 number, since 2×21220102013231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220102013291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157358765 + ... + 157493558.

It is an arithmetic number, because the mean of its divisors is an integer number (1947204197778).

Almost surely, 2^{21220102013231} is an apocalyptic number.

21220102013231 is a deficient number, since it is larger than the sum of its proper divisors (2146348360105).

21220102013231 is a wasteful number, since it uses less digits than its factorization.

21220102013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314852902 (or 314852891 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21220102013231 its reverse (13231020102212), we get a palindrome (34451122115443).

The spelling of 21220102013231 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, thirteen thousand, two hundred thirty-one".