1351642720122 has 20 divisors (see below), whose sum is σ = 3028680910266. Its totient is φ = 450547573320.

The previous prime is 1351642720079. The next prime is 1351642720157. The reversal of 1351642720122 is 2210272461531.

1351642720122 is a `hidden beast` number, since 1 + 3 + 5 + 1 + 6 + 427 + 201 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1114141469841 + 237501250281 = 1055529^2 + 487341^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4171736629 + ... + 4171736952.

Almost surely, 2^{1351642720122} is an apocalyptic number.

1351642720122 is an abundant number, since it is smaller than the sum of its proper divisors (1677038190144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1351642720122 is an equidigital number, since it uses as much as digits as its factorization.

1351642720122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343473595 (or 8343473586 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 1351642720122 in words is "one trillion, three hundred fifty-one billion, six hundred forty-two million, seven hundred twenty thousand, one hundred twenty-two".