2102220120121 has 8 divisors (see below), whose sum is σ = 2312284190688. Its totient is φ = 1911109198900.

The previous prime is 2102220120107. The next prime is 2102220120191. The reversal of 2102220120121 is 1210210222012.

It is a happy number.

It is not a de Polignac number, because 2102220120121 - 2⁵ = 2102220120089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102220120095 and 2102220120104.

It is not an unprimeable number, because it can be changed into a prime (2102220120191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789713215 + ... + 789715876.

It is an arithmetic number, because the mean of its divisors is an integer number (289035523836).

Almost surely, 2^{2102220120121} is an apocalyptic number.

It is an amenable number.

2102220120121 is a deficient number, since it is larger than the sum of its proper divisors (210064070567).

2102220120121 is an equidigital number, since it uses as much as digits as its factorization.

2102220120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579429124 (or 1579429102 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2102220120121 its reverse (1210210222012), we get a palindrome (3312430342133).

The spelling of 2102220120121 in words is "two trillion, one hundred two billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-one".