20102120201 has 2 divisors, whose sum is σ = 20102120202. Its totient is φ = 20102120200.

The previous prime is 20102120183. The next prime is 20102120209. The reversal of 20102120201 is 10202120102.

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., 19137955600 + 964164601 = 138340^2 + 31051^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102120201 - 2¹⁴ = 20102103817 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102120209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051060100 + 10051060101.

It is an arithmetic number, because the mean of its divisors is an integer number (10051060101).

Almost surely, 2^20102120201 is an apocalyptic number.

It is an amenable number.

20102120201 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102120201 is an equidigital number, since it uses as much as digits as its factorization.

20102120201 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.

Adding to 20102120201 its reverse (10202120102), we get a palindrome (30304240303).

Subtracting from 20102120201 its reverse (10202120102), we obtain a palindrome (9900000099).

The spelling of 20102120201 in words is "twenty billion, one hundred two million, one hundred twenty thousand, two hundred one".