21000221022011 has 64 divisors (see below), whose sum is σ = 27085130956800. Its totient is φ = 15801730214400.

The previous prime is 21000221021959. The next prime is 21000221022017. The reversal of 21000221022011 is 11022012200012.

It is a cyclic number.

It is not a de Polignac number, because 21000221022011 - 2²⁶ = 21000153913147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000221022017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2665336970 + ... + 2665344848.

It is an arithmetic number, because the mean of its divisors is an integer number (423205171200).

Almost surely, 2^{21000221022011} is an apocalyptic number.

21000221022011 is a deficient number, since it is larger than the sum of its proper divisors (6084909934789).

21000221022011 is a wasteful number, since it uses less digits than its factorization.

21000221022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200.

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

Adding to 21000221022011 its reverse (11022012200012), we get a palindrome (32022233222023).

The spelling of 21000221022011 in words is "twenty-one trillion, two hundred twenty-one million, twenty-two thousand, eleven".