1010202112121 has 4 divisors (see below), whose sum is σ = 1010233598052. Its totient is φ = 1010170626192.

The previous prime is 1010202112099. The next prime is 1010202112133. The reversal of 1010202112121 is 1212112020101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 271221182521 + 738980929600 = 520789^2 + 859640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010202112121 - 2³⁴ = 993022242937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010202112096 and 1010202112105.

It is not an unprimeable number, because it can be changed into a prime (1010202112151) 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 3 ways as a sum of consecutive naturals, for example, 15694790 + ... + 15759023.

It is an arithmetic number, because the mean of its divisors is an integer number (252558399513).

Almost surely, 2^{1010202112121} is an apocalyptic number.

It is an amenable number.

1010202112121 is a deficient number, since it is larger than the sum of its proper divisors (31485931).

1010202112121 is an equidigital number, since it uses as much as digits as its factorization.

1010202112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31485930.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1010202112121 its reverse (1212112020101), we get a palindrome (2222314132222).

The spelling of 1010202112121 in words is "one trillion, ten billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".