21020312023122 has 32 divisors (see below), whose sum is σ = 43019256329280. Its totient is φ = 6843672440640.

The previous prime is 21020312023111. The next prime is 21020312023127. The reversal of 21020312023122 is 22132021302012.

It is not an unprimeable number, because it can be changed into a prime (21020312023127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11211972 + ... + 12951792.

It is an arithmetic number, because the mean of its divisors is an integer number (1344351760290).

Almost surely, 2^{21020312023122} is an apocalyptic number.

21020312023122 is an abundant number, since it is smaller than the sum of its proper divisors (21998944306158).

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

21020312023122 is a wasteful number, since it uses less digits than its factorization.

21020312023122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786698.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21020312023122 its reverse (22132021302012), we get a palindrome (43152333325134).

The spelling of 21020312023122 in words is "twenty-one trillion, twenty billion, three hundred twelve million, twenty-three thousand, one hundred twenty-two".