121023103231021 has 16 divisors (see below), whose sum is σ = 134920606685760. Its totient is φ = 107881804005120.

The previous prime is 121023103231013. The next prime is 121023103231033. The reversal of 121023103231021 is 120132301320121.

It is not a de Polignac number, because 121023103231021 - 2³ = 121023103231013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121023103230983 and 121023103231001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121023103531021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46189590 + ... + 48739351.

It is an arithmetic number, because the mean of its divisors is an integer number (8432537917860).

Almost surely, 2^{121023103231021} is an apocalyptic number.

It is an amenable number.

121023103231021 is a deficient number, since it is larger than the sum of its proper divisors (13897503454739).

121023103231021 is a wasteful number, since it uses less digits than its factorization.

121023103231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94932924.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 121023103231021 its reverse (120132301320121), we get a palindrome (241155404551142).

The spelling of 121023103231021 in words is "one hundred twenty-one trillion, twenty-three billion, one hundred three million, two hundred thirty-one thousand, twenty-one".