121340422451 has 4 divisors (see below), whose sum is σ = 121342074504. Its totient is φ = 121338770400.

The previous prime is 121340422439. The next prime is 121340422457. The reversal of 121340422451 is 154224043121.

It is a happy number.

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 121340422451 - 2¹⁸ = 121340160307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121340422457) 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, 710465 + ... + 864546.

It is an arithmetic number, because the mean of its divisors is an integer number (30335518626).

Almost surely, 2^121340422451 is an apocalyptic number.

121340422451 is a deficient number, since it is larger than the sum of its proper divisors (1652053).

121340422451 is an equidigital number, since it uses as much as digits as its factorization.

121340422451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652052.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 121340422451 its reverse (154224043121), we get a palindrome (275564465572).

The spelling of 121340422451 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-two thousand, four hundred fifty-one".