121203020031 has 4 divisors (see below), whose sum is σ = 161604026712. Its totient is φ = 80802013352.

The previous prime is 121203019999. The next prime is 121203020041. The reversal of 121203020031 is 130020302121.

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 121203020031 - 2⁵ = 121203019999 is a prime.

It is a super-2 number, since 2×121203020031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121203020041) 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 3 ways as a sum of consecutive naturals, for example, 20200503336 + ... + 20200503341.

It is an arithmetic number, because the mean of its divisors is an integer number (40401006678).

Almost surely, 2^121203020031 is an apocalyptic number.

121203020031 is a deficient number, since it is larger than the sum of its proper divisors (40401006681).

121203020031 is an equidigital number, since it uses as much as digits as its factorization.

121203020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40401006680.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 121203020031 its reverse (130020302121), we get a palindrome (251223322152).

The spelling of 121203020031 in words is "one hundred twenty-one billion, two hundred three million, twenty thousand, thirty-one".