2001122020120 has 32 divisors (see below), whose sum is σ = 4553114716800. Its totient is φ = 791454999808.

The previous prime is 2001122020063. The next prime is 2001122020127. The reversal of 2001122020120 is 210202211002.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001122020120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001122020127) 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, 281052904 + ... + 281060023.

It is an arithmetic number, because the mean of its divisors is an integer number (142284834900).

Almost surely, 2^{2001122020120} is an apocalyptic number.

2001122020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001122020120 is an abundant number, since it is smaller than the sum of its proper divisors (2551992696680).

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

2001122020120 is a wasteful number, since it uses less digits than its factorization.

2001122020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562113027 (or 562113023 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001122020120 its reverse (210202211002), we get a palindrome (2211324231122).

The spelling of 2001122020120 in words is "two trillion, one billion, one hundred twenty-two million, twenty thousand, one hundred twenty".