121002123031 has 4 divisors (see below), whose sum is σ = 128119894992. Its totient is φ = 113884351072.

The previous prime is 121002123007. The next prime is 121002123043. The reversal of 121002123031 is 130321200121.

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 121002123031 - 2¹¹ = 121002120983 is a prime.

It is a super-2 number, since 2×121002123031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002122996 and 121002123014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002123731) 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, 3558885955 + ... + 3558885988.

It is an arithmetic number, because the mean of its divisors is an integer number (32029973748).

Almost surely, 2^121002123031 is an apocalyptic number.

121002123031 is a deficient number, since it is larger than the sum of its proper divisors (7117771961).

121002123031 is an equidigital number, since it uses as much as digits as its factorization.

121002123031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117771960.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 121002123031 its reverse (130321200121), we get a palindrome (251323323152).

The spelling of 121002123031 in words is "one hundred twenty-one billion, two million, one hundred twenty-three thousand, thirty-one".