201131231222 has 4 divisors (see below), whose sum is σ = 301696846836. Its totient is φ = 100565615610.

The previous prime is 201131231219. The next prime is 201131231237. The reversal of 201131231222 is 222132131102.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×201131231222² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201131231194 and 201131231203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50282807804 + ... + 50282807807.

It is an arithmetic number, because the mean of its divisors is an integer number (75424211709).

Almost surely, 2^201131231222 is an apocalyptic number.

201131231222 is a deficient number, since it is larger than the sum of its proper divisors (100565615614).

201131231222 is a wasteful number, since it uses less digits than its factorization.

201131231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100565615613.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 201131231222 its reverse (222132131102), we get a palindrome (423263362324).

The spelling of 201131231222 in words is "two hundred one billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty-two".