100121322031 has 4 divisors (see below), whose sum is σ = 100885607064. Its totient is φ = 99357037000.

The previous prime is 100121322023. The next prime is 100121322043. The reversal of 100121322031 is 130223121001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130223121001 = 35839 ⋅3633559.

It is a cyclic number.

It is not a de Polignac number, because 100121322031 - 2³ = 100121322023 is a prime.

It is a super-2 number, since 2×100121322031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121321996 and 100121322014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121322331) 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, 382142320 + ... + 382142581.

It is an arithmetic number, because the mean of its divisors is an integer number (25221401766).

Almost surely, 2^100121322031 is an apocalyptic number.

100121322031 is a deficient number, since it is larger than the sum of its proper divisors (764285033).

100121322031 is an equidigital number, since it uses as much as digits as its factorization.

100121322031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764285032.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 100121322031 its reverse (130223121001), we get a palindrome (230344443032).

The spelling of 100121322031 in words is "one hundred billion, one hundred twenty-one million, three hundred twenty-two thousand, thirty-one".