121021021002021 has 128 divisors (see below), whose sum is σ = 209195119411200. Its totient is φ = 60615543732480.

The previous prime is 121021021001963. The next prime is 121021021002031. The reversal of 121021021002021 is 120200120120121.

It is not a de Polignac number, because 121021021002021 - 2⁷ = 121021021001893 is a prime.

It is a super-3 number, since 3×121021021002021³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021021002031) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 588500800 + ... + 588706406.

It is an arithmetic number, because the mean of its divisors is an integer number (1634336870400).

Almost surely, 2^{121021021002021} is an apocalyptic number.

It is an amenable number.

121021021002021 is a deficient number, since it is larger than the sum of its proper divisors (88174098409179).

121021021002021 is a wasteful number, since it uses less digits than its factorization.

121021021002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207759.

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

Adding to 121021021002021 its reverse (120200120120121), we get a palindrome (241221141122142).

The spelling of 121021021002021 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, two thousand, twenty-one".