2001122121102 has 32 divisors (see below), whose sum is σ = 4310194176288. Its totient is φ = 615717741696.

The previous prime is 2001122121073. The next prime is 2001122121137. The reversal of 2001122121102 is 2011212211002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4235128 + ... + 4683860.

It is an arithmetic number, because the mean of its divisors is an integer number (134693568009).

Almost surely, 2^{2001122121102} is an apocalyptic number.

2001122121102 is an abundant number, since it is smaller than the sum of its proper divisors (2309072055186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001122121102 is a wasteful number, since it uses less digits than its factorization.

2001122121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505924.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001122121102 its reverse (2011212211002), we get a palindrome (4012334332104).

The spelling of 2001122121102 in words is "two trillion, one billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred two".