21011022120000 has 280 divisors, whose sum is σ = 75782559343392. Its totient is φ = 5093580800000.

The previous prime is 21011022119959. The next prime is 21011022120017. The reversal of 21011022120000 is 2122011012.

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 39 ways as a sum of consecutive naturals, for example, 6638721 + ... + 9278720.

Almost surely, 2^{21011022120000} is an apocalyptic number.

21011022120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011022120000 is an abundant number, since it is smaller than the sum of its proper divisors (54771537223392).

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

21011022120000 is a wasteful number, since it uses less digits than its factorization.

21011022120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917487 (or 15917462 counting only the distinct ones).

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

Adding to 21011022120000 its reverse (2122011012), we get a palindrome (21013144131012).

The spelling of 21011022120000 in words is "twenty-one trillion, eleven billion, twenty-two million, one hundred twenty thousand".