101001121099979 has 4 divisors (see below), whose sum is σ = 101143576842720. Its totient is φ = 100858665357240.

The previous prime is 101001121099951. The next prime is 101001121100029. The reversal of 101001121099979 is 979990121100101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101001121099979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101001121099909) 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, 71227870307 + ... + 71227871724.

It is an arithmetic number, because the mean of its divisors is an integer number (25285894210680).

Almost surely, 2^{101001121099979} is an apocalyptic number.

101001121099979 is a deficient number, since it is larger than the sum of its proper divisors (142455742741).

101001121099979 is an equidigital number, since it uses as much as digits as its factorization.

101001121099979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142455742740.

The product of its (nonzero) digits is 91854, while the sum is 50.

The spelling of 101001121099979 in words is "one hundred one trillion, one billion, one hundred twenty-one million, ninety-nine thousand, nine hundred seventy-nine".