2120661516016 has 20 divisors (see below), whose sum is σ = 4109139857592. Its totient is φ = 1060238326976.

The previous prime is 2120661515963. The next prime is 2120661516091. The reversal of 2120661516016 is 6106151660212.

It is a super-2 number, since 2×2120661516016² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5587471 + ... + 5954926.

Almost surely, 2^{2120661516016} is an apocalyptic number.

It is an amenable number.

2120661516016 is a deficient number, since it is larger than the sum of its proper divisors (1988478341576).

2120661516016 is a wasteful number, since it uses less digits than its factorization.

2120661516016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11553888 (or 11553882 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 2120661516016 in words is "two trillion, one hundred twenty billion, six hundred sixty-one million, five hundred sixteen thousand, sixteen".