2121516652216 has 16 divisors (see below), whose sum is σ = 4283831701800. Its totient is φ = 979161531744.

The previous prime is 2121516652207. The next prime is 2121516652237. The reversal of 2121516652216 is 6122566151212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10199599186 + ... + 10199599393.

Almost surely, 2^{2121516652216} is an apocalyptic number.

2121516652216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2121516652216 is an abundant number, since it is smaller than the sum of its proper divisors (2162315049584).

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

2121516652216 is a wasteful number, since it uses less digits than its factorization.

2121516652216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20399198598 (or 20399198594 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The spelling of 2121516652216 in words is "two trillion, one hundred twenty-one billion, five hundred sixteen million, six hundred fifty-two thousand, two hundred sixteen".