2221022120121 has 96 divisors (see below), whose sum is σ = 3998025574400. Its totient is φ = 1190433672000.

The previous prime is 2221022120117. The next prime is 2221022120147. The reversal of 2221022120121 is 1210212201222.

It is a happy number.

2221022120121 is a `hidden beast` number, since 2 + 221 + 0 + 221 + 201 + 21 = 666.

It is not a de Polignac number, because 2221022120121 - 2² = 2221022120117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221022120094 and 2221022120103.

It is not an unprimeable number, because it can be changed into a prime (2221022120021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 36601476 + ... + 36662106.

Almost surely, 2^{2221022120121} is an apocalyptic number.

2221022120121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221022120121 is a deficient number, since it is larger than the sum of its proper divisors (1777003454279).

2221022120121 is a wasteful number, since it uses less digits than its factorization.

2221022120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60868 (or 60761 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221022120121 its reverse (1210212201222), we get a palindrome (3431234321343).

The spelling of 2221022120121 in words is "two trillion, two hundred twenty-one billion, twenty-two million, one hundred twenty thousand, one hundred twenty-one".