2121012308918 has 16 divisors (see below), whose sum is σ = 3195924996096. Its totient is φ = 1055714567400.

The previous prime is 2121012308917. The next prime is 2121012308939. The reversal of 2121012308918 is 8198032101212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012308917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246558 + ... + 3047793.

It is an arithmetic number, because the mean of its divisors is an integer number (199745312256).

Almost surely, 2^{2121012308918} is an apocalyptic number.

2121012308918 is a deficient number, since it is larger than the sum of its proper divisors (1074912687178).

2121012308918 is a wasteful number, since it uses less digits than its factorization.

2121012308918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295259.

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 2121012308918 in words is "two trillion, one hundred twenty-one billion, twelve million, three hundred eight thousand, nine hundred eighteen".