201342502121 has 2 divisors, whose sum is σ = 201342502122. Its totient is φ = 201342502120.

The previous prime is 201342502103. The next prime is 201342502211. The reversal of 201342502121 is 121205243102.

Together with next prime (201342502211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181530532096 + 19811970025 = 426064^2 + 140755^2 .

It is a cyclic number.

It is not a de Polignac number, because 201342502121 - 2³⁰ = 200268760297 is a prime.

It is not a weakly prime, because it can be changed into another prime (201342502721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100671251060 + 100671251061.

It is an arithmetic number, because the mean of its divisors is an integer number (100671251061).

Almost surely, 2^201342502121 is an apocalyptic number.

It is an amenable number.

201342502121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201342502121 is an equidigital number, since it uses as much as digits as its factorization.

201342502121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 201342502121 its reverse (121205243102), we get a palindrome (322547745223).

The spelling of 201342502121 in words is "two hundred one billion, three hundred forty-two million, five hundred two thousand, one hundred twenty-one".