137620701021971 has 2 divisors, whose sum is σ = 137620701021972. Its totient is φ = 137620701021970.

The previous prime is 137620701021949. The next prime is 137620701022003. The reversal of 137620701021971 is 179120107026731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137620701021971 - 2³⁸ = 137345823115027 is a prime.

It is not a weakly prime, because it can be changed into another prime (137620701021911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68810350510985 + 68810350510986.

It is an arithmetic number, because the mean of its divisors is an integer number (68810350510986).

Almost surely, 2^{137620701021971} is an apocalyptic number.

137620701021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

137620701021971 is an equidigital number, since it uses as much as digits as its factorization.

137620701021971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 47.

The spelling of 137620701021971 in words is "one hundred thirty-seven trillion, six hundred twenty billion, seven hundred one million, twenty-one thousand, nine hundred seventy-one".