2121111201 has 32 divisors (see below), whose sum is σ = 3140960256. Its totient is φ = 1262520000.

The previous prime is 2121111193. The next prime is 2121111217. The reversal of 2121111201 is 1021111212.

It is not a de Polignac number, because 2121111201 - 2³ = 2121111193 is a prime.

It is a super-2 number, since 2×2121111201² = 8998225454015324802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121111241) 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, 420786 + ... + 425796.

It is an arithmetic number, because the mean of its divisors is an integer number (98155008).

Almost surely, 2^2121111201 is an apocalyptic number.

It is an amenable number.

2121111201 is a deficient number, since it is larger than the sum of its proper divisors (1019849055).

2121111201 is a wasteful number, since it uses less digits than its factorization.

2121111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2121111201 is about 46055.5230238459. The cubic root of 2121111201 is about 1284.8560656762.

Adding to 2121111201 its reverse (1021111212), we get a palindrome (3142222413).

It can be divided in two parts, 212111 and 1201, that added together give a palindrome (213312).

The spelling of 2121111201 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred one".