22011021012 has 24 divisors (see below), whose sum is σ = 52451796096. Its totient is φ = 7180900288.

The previous prime is 22011020989. The next prime is 22011021023. The reversal of 22011021012 is 21012011022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19512753 + ... + 19513880.

It is an arithmetic number, because the mean of its divisors is an integer number (2185491504).

Almost surely, 2^22011021012 is an apocalyptic number.

It is an amenable number.

22011021012 is an abundant number, since it is smaller than the sum of its proper divisors (30440775084).

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

22011021012 is a wasteful number, since it uses less digits than its factorization.

22011021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39026687 (or 39026685 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22011021012 its reverse (21012011022), we get a palindrome (43023032034).

The spelling of 22011021012 in words is "twenty-two billion, eleven million, twenty-one thousand, twelve".