101020155905 has 16 divisors (see below), whose sum is σ = 122091322368. Its totient is φ = 80238600000.

The previous prime is 101020155883. The next prime is 101020155911. The reversal of 101020155905 is 509551020101.

It is not a de Polignac number, because 101020155905 - 2²⁸ = 100751720449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1438715 + ... + 1507295.

It is an arithmetic number, because the mean of its divisors is an integer number (7630707648).

Almost surely, 2^101020155905 is an apocalyptic number.

It is an amenable number.

101020155905 is a deficient number, since it is larger than the sum of its proper divisors (21071166463).

101020155905 is a wasteful number, since it uses less digits than its factorization.

101020155905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70688.

The product of its (nonzero) digits is 2250, while the sum is 29.

The spelling of 101020155905 in words is "one hundred one billion, twenty million, one hundred fifty-five thousand, nine hundred five".