1011515421161 has 32 divisors (see below), whose sum is σ = 1204563360000. Its totient is φ = 831059212032.

The previous prime is 1011515421139. The next prime is 1011515421181. The reversal of 1011515421161 is 1611245151101.

It is a de Polignac number, because none of the positive numbers 2^k-1011515421161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (1011515421101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16192790 + ... + 16255136.

It is an arithmetic number, because the mean of its divisors is an integer number (37642605000).

Almost surely, 2^{1011515421161} is an apocalyptic number.

It is an amenable number.

1011515421161 is a deficient number, since it is larger than the sum of its proper divisors (193047938839).

1011515421161 is a wasteful number, since it uses less digits than its factorization.

1011515421161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62961.

The product of its (nonzero) digits is 1200, while the sum is 29.

The spelling of 1011515421161 in words is "one trillion, eleven billion, five hundred fifteen million, four hundred twenty-one thousand, one hundred sixty-one".