2121021200122 has 16 divisors (see below), whose sum is σ = 3472792898400. Its totient is φ = 963536397040.

The previous prime is 2121021200119. The next prime is 2121021200147. The reversal of 2121021200122 is 2210021201212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2121021200096 and 2121021200105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28168972 + ... + 28244167.

It is an arithmetic number, because the mean of its divisors is an integer number (217049556150).

Almost surely, 2^{2121021200122} is an apocalyptic number.

2121021200122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2121021200122 is a deficient number, since it is larger than the sum of its proper divisors (1351771698278).

2121021200122 is a wasteful number, since it uses less digits than its factorization.

2121021200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56414861.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121021200122 its reverse (2210021201212), we get a palindrome (4331042401334).

The spelling of 2121021200122 in words is "two trillion, one hundred twenty-one billion, twenty-one million, two hundred thousand, one hundred twenty-two".