1331100121 has 8 divisors (see below), whose sum is σ = 1457789760. Its totient is φ = 1207881552.

The previous prime is 1331100097. The next prime is 1331100139. The reversal of 1331100121 is 1210011331.

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-1331100121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331100161) 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, 866965 + ... + 868498.

It is an arithmetic number, because the mean of its divisors is an integer number (182223720).

Almost surely, 2^1331100121 is an apocalyptic number.

It is an amenable number.

1331100121 is a deficient number, since it is larger than the sum of its proper divisors (126689639).

1331100121 is a wasteful number, since it uses less digits than its factorization.

1331100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735535.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1331100121 is about 36484.2448325301. The cubic root of 1331100121 is about 1100.0275808511.

Adding to 1331100121 its reverse (1210011331), we get a palindrome (2541111452).

The spelling of 1331100121 in words is "one billion, three hundred thirty-one million, one hundred thousand, one hundred twenty-one".