121010202031021 has 4 divisors (see below), whose sum is σ = 121018577033500. Its totient is φ = 121001827028544.

The previous prime is 121010202031003. The next prime is 121010202031039. The reversal of 121010202031021 is 120130202010121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121010202031003) and next prime (121010202031039).

It can be written as a sum of positive squares in 2 ways, for example, as 72298373094025 + 48711828936996 = 8502845^2 + 6979386^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010202031021 - 2²⁷ = 121010067813293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010202030986 and 121010202031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010202031051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4187479566 + ... + 4187508463.

It is an arithmetic number, because the mean of its divisors is an integer number (30254644258375).

Almost surely, 2^{121010202031021} is an apocalyptic number.

It is an amenable number.

121010202031021 is a deficient number, since it is larger than the sum of its proper divisors (8375002479).

121010202031021 is an equidigital number, since it uses as much as digits as its factorization.

121010202031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8375002478.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121010202031021 its reverse (120130202010121), we get a palindrome (241140404041142).

The spelling of 121010202031021 in words is "one hundred twenty-one trillion, ten billion, two hundred two million, thirty-one thousand, twenty-one".