2111002221121 has 16 divisors (see below), whose sum is σ = 2251496217600. Its totient is φ = 1973619405648.

The previous prime is 2111002221101. The next prime is 2111002221143. The reversal of 2111002221121 is 1211222001112.

It is a cyclic number.

It is not a de Polignac number, because 2111002221121 - 2⁵ = 2111002221089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111002221095 and 2111002221104.

It is not an unprimeable number, because it can be changed into a prime (2111002221101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952125 + ... + 2834218.

It is an arithmetic number, because the mean of its divisors is an integer number (140718513600).

Almost surely, 2^{2111002221121} is an apocalyptic number.

It is an amenable number.

2111002221121 is a deficient number, since it is larger than the sum of its proper divisors (140493996479).

2111002221121 is a wasteful number, since it uses less digits than its factorization.

2111002221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786668.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111002221121 its reverse (1211222001112), we get a palindrome (3322224222233).

The spelling of 2111002221121 in words is "two trillion, one hundred eleven billion, two million, two hundred twenty-one thousand, one hundred twenty-one".