20012121002 has 16 divisors (see below), whose sum is σ = 31095152640. Its totient is φ = 9648000432.

The previous prime is 20012121001. The next prime is 20012121007.

It is a happy number.

20012121002 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (20012121001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189098 + ... + 275285.

It is an arithmetic number, because the mean of its divisors is an integer number (1943447040).

Almost surely, 2^20012121002 is an apocalyptic number.

20012121002 is a deficient number, since it is larger than the sum of its proper divisors (11083031638).

20012121002 is a wasteful number, since it uses less digits than its factorization.

20012121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465157.

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

Multiplying 20012121002 by its sum of digits (11), we get a palindrome (220133331022).

The spelling of 20012121002 in words is "twenty billion, twelve million, one hundred twenty-one thousand, two".