2102120201 has 2 divisors, whose sum is σ = 2102120202. Its totient is φ = 2102120200.

The previous prime is 2102120147. The next prime is 2102120221. The reversal of 2102120201 is 1020212012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1391364601 + 710755600 = 37301^2 + 26660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102120201 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051060100 + 1051060101.

It is an arithmetic number, because the mean of its divisors is an integer number (1051060101).

Almost surely, 2^2102120201 is an apocalyptic number.

It is an amenable number.

2102120201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102120201 is an equidigital number, since it uses as much as digits as its factorization.

2102120201 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 11.

The square root of 2102120201 is about 45848.8844030037. The cubic root of 2102120201 is about 1281.0099859405.

Adding to 2102120201 its reverse (1020212012), we get a palindrome (3122332213).

The spelling of 2102120201 in words is "two billion, one hundred two million, one hundred twenty thousand, two hundred one".