21011111022000 has 160 divisors (see below), whose sum is σ = 73897987797504. Its totient is φ = 5093602656000.

The previous prime is 21011111021921. The next prime is 21011111022001. The reversal of 21011111022000 is 22011111012.

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

It is not an unprimeable number, because it can be changed into a prime (21011111022001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159109084 + ... + 159241083.

Almost surely, 2^{21011111022000} is an apocalyptic number.

21011111022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011111022000 is an abundant number, since it is smaller than the sum of its proper divisors (52886876775504).

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

21011111022000 is a wasteful number, since it uses less digits than its factorization.

21011111022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318350204 (or 318350188 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011111022000 its reverse (22011111012), we get a palindrome (21033122133012).

The spelling of 21011111022000 in words is "twenty-one trillion, eleven billion, one hundred eleven million, twenty-two thousand".