201121133231 has 8 divisors (see below), whose sum is σ = 209951705184. Its totient is φ = 192297742560.

The previous prime is 201121133173. The next prime is 201121133243. The reversal of 201121133231 is 132331121102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201121133231 - 2¹⁰ = 201121132207 is a prime.

It is a super-2 number, since 2×201121133231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121133261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1738040 + ... + 1850141.

It is an arithmetic number, because the mean of its divisors is an integer number (26243963148).

Almost surely, 2^201121133231 is an apocalyptic number.

201121133231 is a deficient number, since it is larger than the sum of its proper divisors (8830571953).

201121133231 is a wasteful number, since it uses less digits than its factorization.

201121133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3590641.

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

Adding to 201121133231 its reverse (132331121102), we get a palindrome (333452254333).

The spelling of 201121133231 in words is "two hundred one billion, one hundred twenty-one million, one hundred thirty-three thousand, two hundred thirty-one".