121432110251 has 4 divisors (see below), whose sum is σ = 121436083272. Its totient is φ = 121428137232.

The previous prime is 121432110199. The next prime is 121432110269. The reversal of 121432110251 is 152011234121.

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 121432110251 - 2⁶ = 121432110187 is a prime.

It is a super-2 number, since 2×121432110251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121432118251) 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, 1940306 + ... + 2001911.

It is an arithmetic number, because the mean of its divisors is an integer number (30359020818).

Almost surely, 2^121432110251 is an apocalyptic number.

121432110251 is a deficient number, since it is larger than the sum of its proper divisors (3973021).

121432110251 is an equidigital number, since it uses as much as digits as its factorization.

121432110251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973020.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 121432110251 its reverse (152011234121), we get a palindrome (273443344372).

The spelling of 121432110251 in words is "one hundred twenty-one billion, four hundred thirty-two million, one hundred ten thousand, two hundred fifty-one".