122151345555451 has 4 divisors (see below), whose sum is σ = 128580363742600. Its totient is φ = 115722327368304.

The previous prime is 122151345555443. The next prime is 122151345555521. The reversal of 122151345555451 is 154555543151221.

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 122151345555451 - 2³ = 122151345555443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122151345555395 and 122151345555404.

It is not an unprimeable number, because it can be changed into a prime (122151345555401) 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, 3214509093546 + ... + 3214509093583.

It is an arithmetic number, because the mean of its divisors is an integer number (32145090935650).

Almost surely, 2^{122151345555451} is an apocalyptic number.

122151345555451 is a deficient number, since it is larger than the sum of its proper divisors (6429018187149).

122151345555451 is an equidigital number, since it uses as much as digits as its factorization.

122151345555451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429018187148.

The product of its digits is 3000000, while the sum is 49.

The spelling of 122151345555451 in words is "one hundred twenty-two trillion, one hundred fifty-one billion, three hundred forty-five million, five hundred fifty-five thousand, four hundred fifty-one".