201131223131 has 4 divisors (see below), whose sum is σ = 211717077000. Its totient is φ = 190545369264.

The previous prime is 201131223127. The next prime is 201131223179. The reversal of 201131223131 is 131322131102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 201131223131 - 2² = 201131223127 is a prime.

It is a super-2 number, since 2×201131223131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201131223121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5292926906 + ... + 5292926943.

It is an arithmetic number, because the mean of its divisors is an integer number (52929269250).

Almost surely, 2^201131223131 is an apocalyptic number.

201131223131 is a deficient number, since it is larger than the sum of its proper divisors (10585853869).

201131223131 is a wasteful number, since it uses less digits than its factorization.

201131223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585853868.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 201131223131 its reverse (131322131102), we get a palindrome (332453354233).

The spelling of 201131223131 in words is "two hundred one billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-one".