2001021120202 has 24 divisors (see below), whose sum is σ = 3250723638816. Its totient is φ = 923393527056.

The previous prime is 2001021120179. The next prime is 2001021120211. The reversal of 2001021120202 is 2020211201002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537593 + ... + 2523139.

It is an arithmetic number, because the mean of its divisors is an integer number (135446818284).

Almost surely, 2^{2001021120202} is an apocalyptic number.

2001021120202 is a deficient number, since it is larger than the sum of its proper divisors (1249702518614).

2001021120202 is a wasteful number, since it uses less digits than its factorization.

2001021120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991582 (or 991569 counting only the distinct ones).

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

Adding to 2001021120202 its reverse (2020211201002), we get a palindrome (4021232321204).

The spelling of 2001021120202 in words is "two trillion, one billion, twenty-one million, one hundred twenty thousand, two hundred two".