210021094939 has 2 divisors, whose sum is σ = 210021094940. Its totient is φ = 210021094938.

The previous prime is 210021094861. The next prime is 210021094981. The reversal of 210021094939 is 939490120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210021094939 - 2²¹ = 210018997787 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021095939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010547469 + 105010547470.

It is an arithmetic number, because the mean of its divisors is an integer number (105010547470).

Almost surely, 2^210021094939 is an apocalyptic number.

210021094939 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021094939 is an equidigital number, since it uses as much as digits as its factorization.

210021094939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 210021094939 in words is "two hundred ten billion, twenty-one million, ninety-four thousand, nine hundred thirty-nine".