121331101 has 4 divisors (see below), whose sum is σ = 122286592. Its totient is φ = 120375612.

The previous prime is 121331069. The next prime is 121331107. The reversal of 121331101 is 101133121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121331101 - 2⁵ = 121331069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331107) 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, 477555 + ... + 477808.

It is an arithmetic number, because the mean of its divisors is an integer number (30571648).

Almost surely, 2^121331101 is an apocalyptic number.

It is an amenable number.

121331101 is a deficient number, since it is larger than the sum of its proper divisors (955491).

121331101 is an equidigital number, since it uses as much as digits as its factorization.

121331101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955490.

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

The square root of 121331101 is about 11015.0397638865. The cubic root of 121331101 is about 495.0594779396.

Adding to 121331101 its reverse (101133121), we get a palindrome (222464222).

The spelling of 121331101 in words is "one hundred twenty-one million, three hundred thirty-one thousand, one hundred one".