121221021001002 has 16 divisors (see below), whose sum is σ = 261091429848480. Its totient is φ = 37298775692592.

The previous prime is 121221021000979. The next prime is 121221021001027. The reversal of 121221021001002 is 200100120122121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777057826852 + ... + 777057827007.

It is an arithmetic number, because the mean of its divisors is an integer number (16318214365530).

Almost surely, 2^{121221021001002} is an apocalyptic number.

121221021001002 is an abundant number, since it is smaller than the sum of its proper divisors (139870408847478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121221021001002 is a wasteful number, since it uses less digits than its factorization.

121221021001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554115653877.

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

Adding to 121221021001002 its reverse (200100120122121), we get a palindrome (321321141123123).

The spelling of 121221021001002 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one thousand, two".