10101038477991 has 4 divisors (see below), whose sum is σ = 13468051303992. Its totient is φ = 6734025651992.

The previous prime is 10101038477963. The next prime is 10101038478007. The reversal of 10101038477991 is 19977483010101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10101038477991 - 2¹⁰ = 10101038476967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101038477921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1683506412996 + ... + 1683506413001.

It is an arithmetic number, because the mean of its divisors is an integer number (3367012825998).

Almost surely, 2^{10101038477991} is an apocalyptic number.

10101038477991 is a deficient number, since it is larger than the sum of its proper divisors (3367012826001).

10101038477991 is an equidigital number, since it uses as much as digits as its factorization.

10101038477991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367012826000.

The product of its (nonzero) digits is 381024, while the sum is 51.

The spelling of 10101038477991 in words is "ten trillion, one hundred one billion, thirty-eight million, four hundred seventy-seven thousand, nine hundred ninety-one".