21022200012 has 48 divisors (see below), whose sum is σ = 53534605824. Its totient is φ = 6367560000.

The previous prime is 21022200007. The next prime is 21022200037. The reversal of 21022200012 is 21000222012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276462 + ... + 344202.

It is an arithmetic number, because the mean of its divisors is an integer number (1115304288).

Almost surely, 2^21022200012 is an apocalyptic number.

21022200012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21022200012 is an abundant number, since it is smaller than the sum of its proper divisors (32512405812).

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

21022200012 is a wasteful number, since it uses less digits than its factorization.

21022200012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70110 (or 70108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21022200012 its reverse (21000222012), we get a palindrome (42022422024).

It can be divided in two parts, 210222000 and 12, that added together give a palindrome (210222012).

The spelling of 21022200012 in words is "twenty-one billion, twenty-two million, two hundred thousand, twelve".