21012220211000 has 32 divisors (see below), whose sum is σ = 49168595296080. Its totient is φ = 8404888084000.

The previous prime is 21012220210897. The next prime is 21012220211027. The reversal of 21012220211000 is 11202221012.

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, 10506109106 + ... + 10506111105.

Almost surely, 2^{21012220211000} is an apocalyptic number.

21012220211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012220211000 is an abundant number, since it is smaller than the sum of its proper divisors (28156375085080).

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

21012220211000 is a wasteful number, since it uses less digits than its factorization.

21012220211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21012220232 (or 21012220218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012220211000 its reverse (11202221012), we get a palindrome (21023422432012).

The spelling of 21012220211000 in words is "twenty-one trillion, twelve billion, two hundred twenty million, two hundred eleven thousand".