21122021211000 has 128 divisors (see below), whose sum is σ = 68173144603200. Its totient is φ = 5438313484800.

The previous prime is 21122021210959. The next prime is 21122021211037. The reversal of 21122021211000 is 11212022112.

It is a super-2 number, since 2×21122021211000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121303927 + ... + 121477926.

Almost surely, 2^{21122021211000} is an apocalyptic number.

21122021211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122021211000 is an abundant number, since it is smaller than the sum of its proper divisors (47051123392200).

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

21122021211000 is a wasteful number, since it uses less digits than its factorization.

21122021211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242781906 (or 242781892 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122021211000 its reverse (11212022112), we get a palindrome (21133233233112).

The spelling of 21122021211000 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, two hundred eleven thousand".