2001222121202 has 96 divisors (see below), whose sum is σ = 3264587504640. Its totient is φ = 919692949760.

The previous prime is 2001222121163. The next prime is 2001222121211. The reversal of 2001222121202 is 2021212221002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2256168803 + ... + 2256169689.

It is an arithmetic number, because the mean of its divisors is an integer number (34006119840).

Almost surely, 2^{2001222121202} is an apocalyptic number.

2001222121202 is a deficient number, since it is larger than the sum of its proper divisors (1263365383438).

2001222121202 is a wasteful number, since it uses less digits than its factorization.

2001222121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1479 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2001222121202 its reverse (2021212221002), we get a palindrome (4022434342204).

The spelling of 2001222121202 in words is "two trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred two".