2221122200121 has 48 divisors (see below), whose sum is σ = 3628137883968. Its totient is φ = 1297511740800.

The previous prime is 2221122200117. The next prime is 2221122200131. The reversal of 2221122200121 is 1210022211222.

It is a happy number.

2221122200121 is a `hidden beast` number, since 2 + 221 + 122 + 200 + 121 = 666.

It is not a de Polignac number, because 2221122200121 - 2² = 2221122200117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221122200094 and 2221122200103.

It is not an unprimeable number, because it can be changed into a prime (2221122200131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2441550 + ... + 3225431.

It is an arithmetic number, because the mean of its divisors is an integer number (75586205916).

Almost surely, 2^{2221122200121} is an apocalyptic number.

It is an amenable number.

2221122200121 is a deficient number, since it is larger than the sum of its proper divisors (1407015683847).

2221122200121 is a wasteful number, since it uses less digits than its factorization.

2221122200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667142 (or 5667139 counting only the distinct ones).

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

Adding to 2221122200121 its reverse (1210022211222), we get a palindrome (3431144411343).

The spelling of 2221122200121 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred thousand, one hundred twenty-one".