2220001022121 has 32 divisors (see below), whose sum is σ = 3190535040000. Its totient is φ = 1368517768128.

The previous prime is 2220001022093. The next prime is 2220001022137. The reversal of 2220001022121 is 1212201000222.

It is not a de Polignac number, because 2220001022121 - 2¹⁰ = 2220001021097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220001022121.

It is not an unprimeable number, because it can be changed into a prime (2220001122121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3105235 + ... + 3752663.

It is an arithmetic number, because the mean of its divisors is an integer number (99704220000).

Almost surely, 2^{2220001022121} is an apocalyptic number.

It is an amenable number.

2220001022121 is a deficient number, since it is larger than the sum of its proper divisors (970534017879).

2220001022121 is a wasteful number, since it uses less digits than its factorization.

2220001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648893.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2220001022121 its reverse (1212201000222), we get a palindrome (3432202022343).

The spelling of 2220001022121 in words is "two trillion, two hundred twenty billion, one million, twenty-two thousand, one hundred twenty-one".