21211020200927 has 2 divisors, whose sum is σ = 21211020200928. Its totient is φ = 21211020200926.

The previous prime is 21211020200849. The next prime is 21211020200933. The reversal of 21211020200927 is 72900202011212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21211020200927 - 2³⁶ = 21142300724191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21211020200927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211020200977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605510100463 + 10605510100464.

It is an arithmetic number, because the mean of its divisors is an integer number (10605510100464).

Almost surely, 2^{21211020200927} is an apocalyptic number.

21211020200927 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211020200927 is an equidigital number, since it uses as much as digits as its factorization.

21211020200927 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 21211020200927 in words is "twenty-one trillion, two hundred eleven billion, twenty million, two hundred thousand, nine hundred twenty-seven".