2121199955682 has 64 divisors (see below), whose sum is σ = 4530721305600. Its totient is φ = 660595703040.

The previous prime is 2121199955587. The next prime is 2121199955683. The reversal of 2121199955682 is 2865599911212.

It is not an unprimeable number, because it can be changed into a prime (2121199955683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93396544 + ... + 93419252.

It is an arithmetic number, because the mean of its divisors is an integer number (70792520400).

Almost surely, 2^{2121199955682} is an apocalyptic number.

2121199955682 is an abundant number, since it is smaller than the sum of its proper divisors (2409521349918).

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

2121199955682 is a wasteful number, since it uses less digits than its factorization.

2121199955682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40091.

The product of its digits is 6998400, while the sum is 60.

The spelling of 2121199955682 in words is "two trillion, one hundred twenty-one billion, one hundred ninety-nine million, nine hundred fifty-five thousand, six hundred eighty-two".