2121201201 has 16 divisors (see below), whose sum is σ = 3343766400. Its totient is φ = 1170317568.

The previous prime is 2121201193. The next prime is 2121201209. The reversal of 2121201201 is 1021021212.

It is an interprime number because it is at equal distance from previous prime (2121201193) and next prime (2121201209).

It is not a de Polignac number, because 2121201201 - 2³ = 2121201193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121201209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740936 + ... + 1742153.

It is an arithmetic number, because the mean of its divisors is an integer number (208985400).

Almost surely, 2^2121201201 is an apocalyptic number.

2121201201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2121201201 is a deficient number, since it is larger than the sum of its proper divisors (1222565199).

2121201201 is a wasteful number, since it uses less digits than its factorization.

2121201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483128.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2121201201 is about 46056.5000949920. The cubic root of 2121201201 is about 1284.8742378196.

Adding to 2121201201 its reverse (1021021212), we get a palindrome (3142222413).

The spelling of 2121201201 in words is "two billion, one hundred twenty-one million, two hundred one thousand, two hundred one".