121010021010021 has 32 divisors (see below), whose sum is σ = 189769317333120. Its totient is φ = 67621071513600.

The previous prime is 121010021010013. The next prime is 121010021010049. The reversal of 121010021010021 is 120010120010121.

It is not a de Polignac number, because 121010021010021 - 2³ = 121010021010013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121010021009979 and 121010021010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010071010021) 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 31 ways as a sum of consecutive naturals, for example, 159709816 + ... + 160465713.

It is an arithmetic number, because the mean of its divisors is an integer number (5930291166660).

Almost surely, 2^{121010021010021} is an apocalyptic number.

121010021010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121010021010021 is a deficient number, since it is larger than the sum of its proper divisors (68759296323099).

121010021010021 is a wasteful number, since it uses less digits than its factorization.

121010021010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320176437.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121010021010021 its reverse (120010120010121), we get a palindrome (241020141020142).

The spelling of 121010021010021 in words is "one hundred twenty-one trillion, ten billion, twenty-one million, ten thousand, twenty-one".