100121323031 has 4 divisors (see below), whose sum is σ = 100122586200. Its totient is φ = 100120059864.

The previous prime is 100121322971. The next prime is 100121323039. The reversal of 100121323031 is 130323121001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130323121001 = 701 ⋅185910301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121323031 is a prime.

It is a super-3 number, since 3×100121323031³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121323039) 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, 504116 + ... + 674073.

It is an arithmetic number, because the mean of its divisors is an integer number (25030646550).

Almost surely, 2^100121323031 is an apocalyptic number.

100121323031 is a deficient number, since it is larger than the sum of its proper divisors (1263169).

100121323031 is an equidigital number, since it uses as much as digits as its factorization.

100121323031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263168.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 100121323031 its reverse (130323121001), we get a palindrome (230444444032).

The spelling of 100121323031 in words is "one hundred billion, one hundred twenty-one million, three hundred twenty-three thousand, thirty-one".