21202113102031 has 8 divisors (see below), whose sum is σ = 21430640650320. Its totient is φ = 20974303066752.

The previous prime is 21202113102029. The next prime is 21202113102041. The reversal of 21202113102031 is 13020131120212.

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

It is a cyclic number.

It is not a de Polignac number, because 21202113102031 - 2¹ = 21202113102029 is a prime.

It is a super-2 number, since 2×21202113102031² (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 (21202113102041) 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, 179318836 + ... + 179437033.

It is an arithmetic number, because the mean of its divisors is an integer number (2678830081290).

Almost surely, 2^{21202113102031} is an apocalyptic number.

21202113102031 is a deficient number, since it is larger than the sum of its proper divisors (228527548289).

21202113102031 is a wasteful number, since it uses less digits than its factorization.

21202113102031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358756505.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21202113102031 its reverse (13020131120212), we get a palindrome (34222244222243).

The spelling of 21202113102031 in words is "twenty-one trillion, two hundred two billion, one hundred thirteen million, one hundred two thousand, thirty-one".