201311131101221 has 8 divisors (see below), whose sum is σ = 201580274108544. Its totient is φ = 201042092039040.

The previous prime is 201311131101211. The next prime is 201311131101229. The reversal of 201311131101221 is 122101131113102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201311131101221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201311131101193 and 201311131101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201311131101229) 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, 22109900 + ... + 29857493.

It is an arithmetic number, because the mean of its divisors is an integer number (25197534263568).

Almost surely, 2^{201311131101221} is an apocalyptic number.

It is an amenable number.

201311131101221 is a deficient number, since it is larger than the sum of its proper divisors (269143007323).

201311131101221 is an equidigital number, since it uses as much as digits as its factorization.

201311131101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51972571.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 201311131101221 its reverse (122101131113102), we get a palindrome (323412262214323).

The spelling of 201311131101221 in words is "two hundred one trillion, three hundred eleven billion, one hundred thirty-one million, one hundred one thousand, two hundred twenty-one".