1210202012121 has 16 divisors (see below), whose sum is σ = 1617889412160. Its totient is φ = 804660799680.

The previous prime is 1210202012083. The next prime is 1210202012161. The reversal of 1210202012121 is 1212102020121.

It is not a de Polignac number, because 1210202012121 - 2⁹ = 1210202011609 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1210202012121.

It is not an unprimeable number, because it can be changed into a prime (1210202012161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366411 + ... + 2070623.

It is an arithmetic number, because the mean of its divisors is an integer number (101118088260).

Almost surely, 2^{1210202012121} is an apocalyptic number.

It is an amenable number.

1210202012121 is a deficient number, since it is larger than the sum of its proper divisors (407687400039).

1210202012121 is an equidigital number, since it uses as much as digits as its factorization.

1210202012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705736.

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

Adding to 1210202012121 its reverse (1212102020121), we get a palindrome (2422304032242).

The spelling of 1210202012121 in words is "one trillion, two hundred ten billion, two hundred two million, twelve thousand, one hundred twenty-one".