2220021122121 has 48 divisors (see below), whose sum is σ = 3615385858560. Its totient is φ = 1345358757600.

The previous prime is 2220021122119. The next prime is 2220021122129. The reversal of 2220021122121 is 1212211200222.

It is a happy number.

It is not a de Polignac number, because 2220021122121 - 2¹ = 2220021122119 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2220021122094 and 2220021122103.

It is not an unprimeable number, because it can be changed into a prime (2220021122129) 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, 61764271 + ... + 61800203.

It is an arithmetic number, because the mean of its divisors is an integer number (75320538720).

Almost surely, 2^{2220021122121} is an apocalyptic number.

It is an amenable number.

2220021122121 is a deficient number, since it is larger than the sum of its proper divisors (1395364736439).

2220021122121 is a wasteful number, since it uses less digits than its factorization.

2220021122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54875 (or 54858 counting only the distinct ones).

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

Adding to 2220021122121 its reverse (1212211200222), we get a palindrome (3432232322343).

The spelling of 2220021122121 in words is "two trillion, two hundred twenty billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".