10202120122121 has 4 divisors (see below), whose sum is σ = 10223418912000. Its totient is φ = 10180821332244.

The previous prime is 10202120122067. The next prime is 10202120122123. The reversal of 10202120122121 is 12122102120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10202120122121 - 2³⁴ = 10184940252937 is a prime.

It is a Duffinian number.

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 10202120122121.

It is not an unprimeable number, because it can be changed into a prime (10202120122123) 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, 10649394221 + ... + 10649395178.

It is an arithmetic number, because the mean of its divisors is an integer number (2555854728000).

Almost surely, 2^{10202120122121} is an apocalyptic number.

It is an amenable number.

10202120122121 is a deficient number, since it is larger than the sum of its proper divisors (21298789879).

10202120122121 is an equidigital number, since it uses as much as digits as its factorization.

10202120122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21298789878.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 10202120122121 its reverse (12122102120201), we get a palindrome (22324222242322).

The spelling of 10202120122121 in words is "ten trillion, two hundred two billion, one hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".