121201023421031 has 6 divisors (see below), whose sum is σ = 128749876091160. Its totient is φ = 114071551454816.

The previous prime is 121201023420973. The next prime is 121201023421069. The reversal of 121201023421031 is 130124320102121.

It is not a de Polignac number, because 121201023421031 - 2³⁸ = 120926145514087 is a prime.

It is a super-2 number, since 2×121201023421031² (a number of 29 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 = 121201023420988 and 121201023421006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201023420031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209690351651 + ... + 209690352228.

It is an arithmetic number, because the mean of its divisors is an integer number (21458312681860).

Almost surely, 2^{121201023421031} is an apocalyptic number.

121201023421031 is a deficient number, since it is larger than the sum of its proper divisors (7548852670129).

121201023421031 is an equidigital number, since it uses as much as digits as its factorization.

121201023421031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419380703913 (or 419380703896 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 121201023421031 its reverse (130124320102121), we get a palindrome (251325343523152).

The spelling of 121201023421031 in words is "one hundred twenty-one trillion, two hundred one billion, twenty-three million, four hundred twenty-one thousand, thirty-one".