2111022222121 has 8 divisors (see below), whose sum is σ = 2162634198984. Its totient is φ = 2059416132480.

The previous prime is 2111022222077. The next prime is 2111022222137. The reversal of 2111022222121 is 1212222201112.

It can be written as a sum of positive squares in 4 ways, for example, as 178032519721 + 1932989702400 = 421939^2 + 1390320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111022222121 - 2³¹ = 2108874738473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111022222181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741510 + ... + 2184463.

It is an arithmetic number, because the mean of its divisors is an integer number (270329274873).

Almost surely, 2^{2111022222121} is an apocalyptic number.

It is an amenable number.

2111022222121 is a deficient number, since it is larger than the sum of its proper divisors (51611976863).

2111022222121 is a wasteful number, since it uses less digits than its factorization.

2111022222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943611.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2111022222121 its reverse (1212222201112), we get a palindrome (3323244423233).

The spelling of 2111022222121 in words is "two trillion, one hundred eleven billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".