201000021979139 has 2 divisors, whose sum is σ = 201000021979140. Its totient is φ = 201000021979138.

The previous prime is 201000021979129. The next prime is 201000021979153. The reversal of 201000021979139 is 931979120000102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201000021979139 - 2²⁴ = 201000005201923 is a prime.

It is a super-2 number, since 2×201000021979139² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201000021979139.

It is not a weakly prime, because it can be changed into another prime (201000021979129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500010989569 + 100500010989570.

It is an arithmetic number, because the mean of its divisors is an integer number (100500010989570).

Almost surely, 2^{201000021979139} is an apocalyptic number.

201000021979139 is a deficient number, since it is larger than the sum of its proper divisors (1).

201000021979139 is an equidigital number, since it uses as much as digits as its factorization.

201000021979139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 201000021979139 in words is "two hundred one trillion, twenty-one million, nine hundred seventy-nine thousand, one hundred thirty-nine".