2120210999999 has 4 divisors (see below), whose sum is σ = 2156146779720. Its totient is φ = 2084275220280.

The previous prime is 2120210999987. The next prime is 2120211000007. The reversal of 2120210999999 is 9999990120212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2120210999999 - 2²⁸ = 2119942564543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120210999909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17967889772 + ... + 17967889889.

It is an arithmetic number, because the mean of its divisors is an integer number (539036694930).

Almost surely, 2^{2120210999999} is an apocalyptic number.

2120210999999 is a deficient number, since it is larger than the sum of its proper divisors (35935779721).

2120210999999 is an equidigital number, since it uses as much as digits as its factorization.

2120210999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35935779720.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The spelling of 2120210999999 in words is "two trillion, one hundred twenty billion, two hundred ten million, nine hundred ninety-nine thousand, nine hundred ninety-nine".