131221103401 has 8 divisors (see below), whose sum is σ = 132524089344. Its totient is φ = 129923120160.

The previous prime is 131221103399. The next prime is 131221103411. The reversal of 131221103401 is 104301122131.

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 131221103401 - 2¹ = 131221103399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131221103411) 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, 1197945 + ... + 1302886.

It is an arithmetic number, because the mean of its divisors is an integer number (16565511168).

Almost surely, 2^131221103401 is an apocalyptic number.

It is an amenable number.

131221103401 is a deficient number, since it is larger than the sum of its proper divisors (1302985943).

131221103401 is a wasteful number, since it uses less digits than its factorization.

131221103401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501351.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131221103401 its reverse (104301122131), we get a palindrome (235522225532).

The spelling of 131221103401 in words is "one hundred thirty-one billion, two hundred twenty-one million, one hundred three thousand, four hundred one".