2130111221 has 16 divisors (see below), whose sum is σ = 2468218368. Its totient is φ = 1800630000.

The previous prime is 2130111187. The next prime is 2130111229. The reversal of 2130111221 is 1221110312.

It is a cyclic number.

It is not a de Polignac number, because 2130111221 - 2¹⁸ = 2129849077 is a prime.

It is a super-2 number, since 2×2130111221² = 9074747627660221682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2130111196 and 2130111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130111229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142346 + ... + 156596.

It is an arithmetic number, because the mean of its divisors is an integer number (154263648).

Almost surely, 2^2130111221 is an apocalyptic number.

It is an amenable number.

2130111221 is a deficient number, since it is larger than the sum of its proper divisors (338107147).

2130111221 is a wasteful number, since it uses less digits than its factorization.

2130111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14552.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2130111221 is about 46153.1279655020. The cubic root of 2130111221 is about 1286.6707455626.

Adding to 2130111221 its reverse (1221110312), we get a palindrome (3351221533).

Subtracting from 2130111221 its reverse (1221110312), we obtain a palindrome (909000909).

The spelling of 2130111221 in words is "two billion, one hundred thirty million, one hundred eleven thousand, two hundred twenty-one".