21012223311000 has 256 divisors, whose sum is σ = 73720000972800. Its totient is φ = 5535749808000.

The previous prime is 21012223310971. The next prime is 21012223311047. The reversal of 21012223311000 is 11332221012.

21012223311000 is a `hidden beast` number, since 2 + 10 + 1 + 222 + 331 + 100 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2447136 + ... + 6929135.

It is an arithmetic number, because the mean of its divisors is an integer number (287968753800).

Almost surely, 2^{21012223311000} is an apocalyptic number.

21012223311000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21012223311000 is an abundant number, since it is smaller than the sum of its proper divisors (52707777661800).

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

21012223311000 is a wasteful number, since it uses less digits than its factorization.

21012223311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9376384 (or 9376364 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21012223311000 its reverse (11332221012), we get a palindrome (21023555532012).

The spelling of 21012223311000 in words is "twenty-one trillion, twelve billion, two hundred twenty-three million, three hundred eleven thousand".