1220969135 has 12 divisors (see below), whose sum is σ = 1501780584. Its totient is φ = 952944960.

The previous prime is 1220969119. The next prime is 1220969177. The reversal of 1220969135 is 5319690221.

It is not a de Polignac number, because 1220969135 - 2⁴ = 1220969119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64229 + ... + 81038.

It is an arithmetic number, because the mean of its divisors is an integer number (125148382).

Almost surely, 2^1220969135 is an apocalyptic number.

1220969135 is a deficient number, since it is larger than the sum of its proper divisors (280811449).

1220969135 is an equidigital number, since it uses as much as digits as its factorization.

1220969135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145354 (or 145313 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 1220969135 is about 34942.3687662986. The cubic root of 1220969135 is about 1068.8125923010.

The spelling of 1220969135 in words is "one billion, two hundred twenty million, nine hundred sixty-nine thousand, one hundred thirty-five".