2111022121 has 16 divisors (see below), whose sum is σ = 2305408000. Its totient is φ = 1921278528.

The previous prime is 2111022119. The next prime is 2111022127. The reversal of 2111022121 is 1212201112.

It is not a de Polignac number, because 2111022121 - 2¹ = 2111022119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111022127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1362055 + ... + 1363603.

It is an arithmetic number, because the mean of its divisors is an integer number (144088000).

Almost surely, 2^2111022121 is an apocalyptic number.

It is an amenable number.

2111022121 is a deficient number, since it is larger than the sum of its proper divisors (194385879).

2111022121 is a wasteful number, since it uses less digits than its factorization.

2111022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 2111022121 is about 45945.8607602469. The cubic root of 2111022121 is about 1282.8156849858.

Adding to 2111022121 its reverse (1212201112), we get a palindrome (3323223233).

The spelling of 2111022121 in words is "two billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".