20001002121002 has 32 divisors (see below), whose sum is σ = 36548895129600. Its totient is φ = 8017913852208.

The previous prime is 20001002120989. The next prime is 20001002121031. The reversal of 20001002121002 is 20012120010002.

It is a happy 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, 475876058 + ... + 475918085.

It is an arithmetic number, because the mean of its divisors is an integer number (1142152972800).

Almost surely, 2^{20001002121002} is an apocalyptic number.

20001002121002 is a deficient number, since it is larger than the sum of its proper divisors (16547893008598).

20001002121002 is a wasteful number, since it uses less digits than its factorization.

20001002121002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951794250.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20001002121002 its reverse (20012120010002), we get a palindrome (40013122131004).

The spelling of 20001002121002 in words is "twenty trillion, one billion, two million, one hundred twenty-one thousand, two".