201212314421 has 2 divisors, whose sum is σ = 201212314422. Its totient is φ = 201212314420.

The previous prime is 201212314361. The next prime is 201212314481. The reversal of 201212314421 is 124413212102.

It is a balanced prime because it is at equal distance from previous prime (201212314361) and next prime (201212314481).

It can be written as a sum of positive squares in only one way, i.e., 192708708196 + 8503606225 = 438986^2 + 92215^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212314421 - 2²⁶ = 201145205557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212314481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606157210 + 100606157211.

It is an arithmetic number, because the mean of its divisors is an integer number (100606157211).

Almost surely, 2^201212314421 is an apocalyptic number.

It is an amenable number.

201212314421 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212314421 is an equidigital number, since it uses as much as digits as its factorization.

201212314421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 201212314421 its reverse (124413212102), we get a palindrome (325625526523).

The spelling of 201212314421 in words is "two hundred one billion, two hundred twelve million, three hundred fourteen thousand, four hundred twenty-one".