120421131351 has 4 divisors (see below), whose sum is σ = 160561508472. Its totient is φ = 80280754232.

The previous prime is 120421131331. The next prime is 120421131419. The reversal of 120421131351 is 153131124021.

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 120421131351 - 2¹⁰ = 120421130327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120421131331) 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, 20070188556 + ... + 20070188561.

It is an arithmetic number, because the mean of its divisors is an integer number (40140377118).

Almost surely, 2^120421131351 is an apocalyptic number.

120421131351 is a deficient number, since it is larger than the sum of its proper divisors (40140377121).

120421131351 is an equidigital number, since it uses as much as digits as its factorization.

120421131351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40140377120.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 120421131351 its reverse (153131124021), we get a palindrome (273552255372).

The spelling of 120421131351 in words is "one hundred twenty billion, four hundred twenty-one million, one hundred thirty-one thousand, three hundred fifty-one".