1212002121021 has 32 divisors (see below), whose sum is σ = 1712918327040. Its totient is φ = 759647379456.

The previous prime is 1212002120977. The next prime is 1212002121041. The reversal of 1212002121021 is 1201212002121.

It is not a de Polignac number, because 1212002121021 - 2⁶ = 1212002120957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002121041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 287406505 + ... + 287410721.

It is an arithmetic number, because the mean of its divisors is an integer number (53528697720).

Almost surely, 2^{1212002121021} is an apocalyptic number.

It is an amenable number.

1212002121021 is a deficient number, since it is larger than the sum of its proper divisors (500916206019).

1212002121021 is a wasteful number, since it uses less digits than its factorization.

1212002121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1212002121021 its reverse (1201212002121), we get a palindrome (2413214123142).

The spelling of 1212002121021 in words is "one trillion, two hundred twelve billion, two million, one hundred twenty-one thousand, twenty-one".