1220355515402 has 16 divisors (see below), whose sum is σ = 1870138772352. Its totient is φ = 596985063360.

The previous prime is 1220355515377. The next prime is 1220355515437. The reversal of 1220355515402 is 2045155530221.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015999 + ... + 2550482.

It is an arithmetic number, because the mean of its divisors is an integer number (116883673272).

Almost surely, 2^{1220355515402} is an apocalyptic number.

1220355515402 is a deficient number, since it is larger than the sum of its proper divisors (649783256950).

1220355515402 is a wasteful number, since it uses less digits than its factorization.

1220355515402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569373.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 1220355515402 in words is "one trillion, two hundred twenty billion, three hundred fifty-five million, five hundred fifteen thousand, four hundred two".