21200201011931 has 2 divisors, whose sum is σ = 21200201011932. Its totient is φ = 21200201011930.

The previous prime is 21200201011853. The next prime is 21200201011963. The reversal of 21200201011931 is 13911010200212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200201011931 - 2¹⁸ = 21200200749787 is a prime.

It is a super-2 number, since 2×21200201011931² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21200201011897 and 21200201011906.

It is not a weakly prime, because it can be changed into another prime (21200201011981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600100505965 + 10600100505966.

It is an arithmetic number, because the mean of its divisors is an integer number (10600100505966).

Almost surely, 2^{21200201011931} is an apocalyptic number.

21200201011931 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200201011931 is an equidigital number, since it uses as much as digits as its factorization.

21200201011931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21200201011931 in words is "twenty-one trillion, two hundred billion, two hundred one million, eleven thousand, nine hundred thirty-one".