21232420122 has 16 divisors (see below), whose sum is σ = 43929145440. Its totient is φ = 6833422512.

The previous prime is 21232420117. The next prime is 21232420127. The reversal of 21232420122 is 22102423212.

It is an interprime number because it is at equal distance from previous prime (21232420117) and next prime (21232420127).

It is a super-2 number, since 2×21232420122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21232420127) 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, 61012528 + ... + 61012875.

It is an arithmetic number, because the mean of its divisors is an integer number (2745571590).

Almost surely, 2^21232420122 is an apocalyptic number.

21232420122 is an abundant number, since it is smaller than the sum of its proper divisors (22696725318).

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

21232420122 is a wasteful number, since it uses less digits than its factorization.

21232420122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122025437.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21232420122 its reverse (22102423212), we get a palindrome (43334843334).

The spelling of 21232420122 in words is "twenty-one billion, two hundred thirty-two million, four hundred twenty thousand, one hundred twenty-two".