121200021100023 has 32 divisors (see below), whose sum is σ = 165447362150400. Its totient is φ = 78878384897760.

The previous prime is 121200021100013. The next prime is 121200021100027. The reversal of 121200021100023 is 320001120002121.

It is not a de Polignac number, because 121200021100023 - 2⁶ = 121200021099959 is a prime.

It is a super-2 number, since 2×121200021100023² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121200021099975 and 121200021100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121200021100027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2211692178 + ... + 2211746976.

It is an arithmetic number, because the mean of its divisors is an integer number (5170230067200).

Almost surely, 2^{121200021100023} is an apocalyptic number.

121200021100023 is a deficient number, since it is larger than the sum of its proper divisors (44247341050377).

121200021100023 is a wasteful number, since it uses less digits than its factorization.

121200021100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63779.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121200021100023 its reverse (320001120002121), we get a palindrome (441201141102144).

The spelling of 121200021100023 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, one hundred thousand, twenty-three".