2121121020122 has 16 divisors (see below), whose sum is σ = 3426944206560. Its totient is φ = 978830948592.

The previous prime is 2121121020097. The next prime is 2121121020191. The reversal of 2121121020122 is 2210201211212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121121020122.

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, 5990588 + ... + 6334775.

It is an arithmetic number, because the mean of its divisors is an integer number (214184012910).

Almost surely, 2^{2121121020122} is an apocalyptic number.

2121121020122 is a deficient number, since it is larger than the sum of its proper divisors (1305823186438).

2121121020122 is a wasteful number, since it uses less digits than its factorization.

2121121020122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12331997.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121121020122 its reverse (2210201211212), we get a palindrome (4331322231334).

The spelling of 2121121020122 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, twenty thousand, one hundred twenty-two".