201211210112501 has 2 divisors, whose sum is σ = 201211210112502. Its totient is φ = 201211210112500.

The previous prime is 201211210112461. The next prime is 201211210112543. The reversal of 201211210112501 is 105211012112102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184535216971876 + 16675993140625 = 13584374^2 + 4083625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211210112501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211210112701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605605056250 + 100605605056251.

It is an arithmetic number, because the mean of its divisors is an integer number (100605605056251).

Almost surely, 2^{201211210112501} is an apocalyptic number.

It is an amenable number.

201211210112501 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211210112501 is an equidigital number, since it uses as much as digits as its factorization.

201211210112501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 20.

Adding to 201211210112501 its reverse (105211012112102), we get a palindrome (306422222224603).

The spelling of 201211210112501 in words is "two hundred one trillion, two hundred eleven billion, two hundred ten million, one hundred twelve thousand, five hundred one".