879990122101 has 4 divisors (see below), whose sum is σ = 910334609100. Its totient is φ = 849645635104.

The previous prime is 879990122027. The next prime is 879990122113. The reversal of 879990122101 is 101221099978.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 343660923076 + 536329199025 = 586226^2 + 732345^2 .

It is a cyclic number.

It is not a de Polignac number, because 879990122101 - 2¹⁵ = 879990089333 is a prime.

It is a super-2 number, since 2×879990122101² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879990122801) 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, 15172243456 + ... + 15172243513.

It is an arithmetic number, because the mean of its divisors is an integer number (227583652275).

Almost surely, 2^879990122101 is an apocalyptic number.

It is an amenable number.

879990122101 is a deficient number, since it is larger than the sum of its proper divisors (30344486999).

879990122101 is a wasteful number, since it uses less digits than its factorization.

879990122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30344486998.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 879990122101 in words is "eight hundred seventy-nine billion, nine hundred ninety million, one hundred twenty-two thousand, one hundred one".