201212123211 has 24 divisors (see below), whose sum is σ = 317109034944. Its totient is φ = 121928469360.

The previous prime is 201212123191. The next prime is 201212123251. The reversal of 201212123211 is 112321212102.

It is not a de Polignac number, because 201212123211 - 2¹⁰ = 201212122187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201212123251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 527020 + ... + 824726.

It is an arithmetic number, because the mean of its divisors is an integer number (13212876456).

Almost surely, 2^201212123211 is an apocalyptic number.

201212123211 is a deficient number, since it is larger than the sum of its proper divisors (115896911733).

201212123211 is a wasteful number, since it uses less digits than its factorization.

201212123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304551 (or 304548 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 201212123211 its reverse (112321212102), we get a palindrome (313533335313).

It can be divided in two parts, 201212 and 123211, that added together give a palindrome (324423).

The spelling of 201212123211 in words is "two hundred one billion, two hundred twelve million, one hundred twenty-three thousand, two hundred eleven".