101231020121 has 24 divisors (see below), whose sum is σ = 127214351040. Its totient is φ = 78851472480.

The previous prime is 101231020097. The next prime is 101231020327. The reversal of 101231020121 is 121020132101.

It is not a de Polignac number, because 101231020121 - 2³⁰ = 100157278297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101231020096 and 101231020105.

It is not an unprimeable number, because it can be changed into a prime (101231010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2366495 + ... + 2408891.

It is an arithmetic number, because the mean of its divisors is an integer number (5300597960).

Almost surely, 2^101231020121 is an apocalyptic number.

101231020121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101231020121 is a deficient number, since it is larger than the sum of its proper divisors (25983330919).

101231020121 is a wasteful number, since it uses less digits than its factorization.

101231020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45245 (or 45234 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 101231020121 its reverse (121020132101), we get a palindrome (222251152222).

The spelling of 101231020121 in words is "one hundred one billion, two hundred thirty-one million, twenty thousand, one hundred twenty-one".