121201134312031 has 4 divisors (see below), whose sum is σ = 128330612800992. Its totient is φ = 114071655823072.

The previous prime is 121201134311981. The next prime is 121201134312053. The reversal of 121201134312031 is 130213431102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121201134312031 - 2⁴⁵ = 86016762223199 is a prime.

It is a super-3 number, since 3×121201134312031³ (a number of 43 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 junction number, because it is equal to n+sod(n) for n = 121201134311987 and 121201134312005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201134318031) 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, 3564739244455 + ... + 3564739244488.

It is an arithmetic number, because the mean of its divisors is an integer number (32082653200248).

Almost surely, 2^{121201134312031} is an apocalyptic number.

121201134312031 is a deficient number, since it is larger than the sum of its proper divisors (7129478488961).

121201134312031 is an equidigital number, since it uses as much as digits as its factorization.

121201134312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129478488960.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 121201134312031 its reverse (130213431102121), we get a palindrome (251414565414152).

The spelling of 121201134312031 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred thirty-four million, three hundred twelve thousand, thirty-one".