201131011111212 has 144 divisors (see below), whose sum is σ = 642652840694592. Its totient is φ = 51611878080000.

The previous prime is 201131011111201. The next prime is 201131011111253. The reversal of 201131011111212 is 212111110131102.

201131011111212 is a `hidden beast` number, since 20 + 1 + 1 + 310 + 11 + 111 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 829545039 + ... + 829787462.

It is an arithmetic number, because the mean of its divisors is an integer number (4462866949268).

Almost surely, 2^{201131011111212} is an apocalyptic number.

It is an amenable number.

201131011111212 is an abundant number, since it is smaller than the sum of its proper divisors (441521829583380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201131011111212 is a wasteful number, since it uses less digits than its factorization.

201131011111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659332568 (or 1659332563 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 201131011111212 its reverse (212111110131102), we get a palindrome (413242121242314).

The spelling of 201131011111212 in words is "two hundred one trillion, one hundred thirty-one billion, eleven million, one hundred eleven thousand, two hundred twelve".