2112121201 has 2 divisors, whose sum is σ = 2112121202. Its totient is φ = 2112121200.

The previous prime is 2112121181. The next prime is 2112121213. The reversal of 2112121201 is 1021212112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1994962225 + 117158976 = 44665^2 + 10824^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112121201 - 2¹³ = 2112113009 is a prime.

It is a super-2 number, since 2×2112121201² = 8922111935427364802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112121241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056060600 + 1056060601.

It is an arithmetic number, because the mean of its divisors is an integer number (1056060601).

Almost surely, 2^2112121201 is an apocalyptic number.

It is an amenable number.

2112121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112121201 is an equidigital number, since it uses as much as digits as its factorization.

2112121201 is an evil number, because the sum of its binary digits is even.

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

The square root of 2112121201 is about 45957.8198025102. The cubic root of 2112121201 is about 1283.0382742289.

Adding to 2112121201 its reverse (1021212112), we get a palindrome (3133333313).

The spelling of 2112121201 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, two hundred one".