21122211023 has 16 divisors (see below), whose sum is σ = 23241504000. Its totient is φ = 19106746560.

The previous prime is 21122210971. The next prime is 21122211049. The reversal of 21122211023 is 32011222112.

It is not a de Polignac number, because 21122211023 - 2¹⁶ = 21122145487 is a prime.

It is a super-2 number, since 2×21122211023² (a number of 21 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 = 21122210992 and 21122211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122211823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207203 + ... + 291851.

It is an arithmetic number, because the mean of its divisors is an integer number (1452594000).

Almost surely, 2^21122211023 is an apocalyptic number.

21122211023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21122211023 is a deficient number, since it is larger than the sum of its proper divisors (2119292977).

21122211023 is a wasteful number, since it uses less digits than its factorization.

21122211023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85262.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21122211023 its reverse (32011222112), we get a palindrome (53133433135).

The spelling of 21122211023 in words is "twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, twenty-three".