21012113123022 has 64 divisors (see below), whose sum is σ = 48608909475840. Its totient is φ = 5930815767264.

The previous prime is 21012113122937. The next prime is 21012113123039. The reversal of 21012113123022 is 22032131121012.

It is a super-2 number, since 2×21012113123022² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21012113123022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70068879 + ... + 70368117.

It is an arithmetic number, because the mean of its divisors is an integer number (759514210560).

Almost surely, 2^{21012113123022} is an apocalyptic number.

21012113123022 is an abundant number, since it is smaller than the sum of its proper divisors (27596796352818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012113123022 is a wasteful number, since it uses less digits than its factorization.

21012113123022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319477.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21012113123022 its reverse (22032131121012), we get a palindrome (43044244244034).

The spelling of 21012113123022 in words is "twenty-one trillion, twelve billion, one hundred thirteen million, one hundred twenty-three thousand, twenty-two".