21122012030 has 128 divisors (see below), whose sum is σ = 45882720000. Its totient is φ = 6992552448.

The previous prime is 21122011991. The next prime is 21122012053. The reversal of 21122012030 is 3021022112.

It is a happy number.

It is a super-2 number, since 2×21122012030² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21122011996 and 21122012014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18909032 + ... + 18910148.

It is an arithmetic number, because the mean of its divisors is an integer number (358458750).

Almost surely, 2^21122012030 is an apocalyptic number.

21122012030 is an abundant number, since it is smaller than the sum of its proper divisors (24760707970).

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

21122012030 is a wasteful number, since it uses less digits than its factorization.

21122012030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1317 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21122012030 its reverse (3021022112), we get a palindrome (24143034142).

The spelling of 21122012030 in words is "twenty-one billion, one hundred twenty-two million, twelve thousand, thirty".