21052311023 has 8 divisors (see below), whose sum is σ = 21835368480. Its totient is φ = 20280520800.

The previous prime is 21052310989. The next prime is 21052311103. The reversal of 21052311023 is 32011325012.

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 21052311023 - 2³² = 16757343727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21052310986 and 21052311004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052316023) 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, 2813003 + ... + 2820476.

It is an arithmetic number, because the mean of its divisors is an integer number (2729421060).

Almost surely, 2^21052311023 is an apocalyptic number.

21052311023 is a deficient number, since it is larger than the sum of its proper divisors (783057457).

21052311023 is a wasteful number, since it uses less digits than its factorization.

21052311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5633617.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 21052311023 its reverse (32011325012), we get a palindrome (53063636035).

The spelling of 21052311023 in words is "twenty-one billion, fifty-two million, three hundred eleven thousand, twenty-three".