121012200021021 has 8 divisors (see below), whose sum is σ = 161349815494944. Its totient is φ = 80674692280560.

The previous prime is 121012200020909. The next prime is 121012200021047. The reversal of 121012200021021 is 120120002210121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121012200021021 - 2³⁵ = 120977840282653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012200021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24274950 + ... + 28832231.

It is an arithmetic number, because the mean of its divisors is an integer number (20168726936868).

Almost surely, 2^{121012200021021} is an apocalyptic number.

It is an amenable number.

121012200021021 is a deficient number, since it is larger than the sum of its proper divisors (40337615473923).

121012200021021 is an equidigital number, since it uses as much as digits as its factorization.

121012200021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53866731.

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

Adding to 121012200021021 its reverse (120120002210121), we get a palindrome (241132202231142).

The spelling of 121012200021021 in words is "one hundred twenty-one trillion, twelve billion, two hundred million, twenty-one thousand, twenty-one".