2122012001990 has 24 divisors (see below), whose sum is σ = 4031234995680. Its totient is φ = 804130862544.

The previous prime is 2122012001959. The next prime is 2122012001999. The reversal of 2122012001990 is 991002102212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122012001999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293903870 + ... + 293911089.

It is an arithmetic number, because the mean of its divisors is an integer number (167968124820).

Almost surely, 2^{2122012001990} is an apocalyptic number.

2122012001990 is a deficient number, since it is larger than the sum of its proper divisors (1909222993690).

2122012001990 is a wasteful number, since it uses less digits than its factorization.

2122012001990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587815004 (or 587814985 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 2122012001990 in words is "two trillion, one hundred twenty-two billion, twelve million, one thousand, nine hundred ninety".