1220115243402 has 96 divisors (see below), whose sum is σ = 3214263798720. Its totient is φ = 329668047360.

The previous prime is 1220115243401. The next prime is 1220115243433. The reversal of 1220115243402 is 2043425110221.

1220115243402 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 1 + 15 + 243 + 402 = 666.

It is not an unprimeable number, because it can be changed into a prime (1220115243401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9475053 + ... + 9602960.

It is an arithmetic number, because the mean of its divisors is an integer number (33481914570).

Almost surely, 2^{1220115243402} is an apocalyptic number.

1220115243402 is an abundant number, since it is smaller than the sum of its proper divisors (1994148555318).

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

1220115243402 is a wasteful number, since it uses less digits than its factorization.

1220115243402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19078068 (or 19078065 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 1220115243402 in words is "one trillion, two hundred twenty billion, one hundred fifteen million, two hundred forty-three thousand, four hundred two".