2121369635378 has 64 divisors (see below), whose sum is σ = 3774296908800. Its totient is φ = 874949644800.

The previous prime is 2121369635369. The next prime is 2121369635389. The reversal of 2121369635378 is 8735369631212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 504965678 + ... + 504969878.

It is an arithmetic number, because the mean of its divisors is an integer number (58973389200).

Almost surely, 2^{2121369635378} is an apocalyptic number.

2121369635378 is a deficient number, since it is larger than the sum of its proper divisors (1652927273422).

2121369635378 is a wasteful number, since it uses less digits than its factorization.

2121369635378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995.

The product of its digits is 9797760, while the sum is 56.

The spelling of 2121369635378 in words is "two trillion, one hundred twenty-one billion, three hundred sixty-nine million, six hundred thirty-five thousand, three hundred seventy-eight".