1002121221021 has 12 divisors (see below), whose sum is σ = 1410187204512. Its totient is φ = 632918665224.

The previous prime is 1002121220999. The next prime is 1002121221037. The reversal of 1002121221021 is 1201221212001.

1002121221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1002121221021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002121221121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462658761 + ... + 462660926.

It is an arithmetic number, because the mean of its divisors is an integer number (117515600376).

Almost surely, 2^{1002121221021} is an apocalyptic number.

It is an amenable number.

1002121221021 is a deficient number, since it is larger than the sum of its proper divisors (408065983491).

1002121221021 is an equidigital number, since it uses as much as digits as its factorization.

1002121221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925319728 (or 925319709 counting only the distinct ones).

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

Adding to 1002121221021 its reverse (1201221212001), we get a palindrome (2203342433022).

The spelling of 1002121221021 in words is "one trillion, two billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-one".