121337221 has 4 divisors (see below), whose sum is σ = 123918912. Its totient is φ = 118755532.

The previous prime is 121337207. The next prime is 121337231. The reversal of 121337221 is 122733121.

It is a happy number.

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 121337221 - 2⁷ = 121337093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121337192 and 121337201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121337231) 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, 1290775 + ... + 1290868.

It is an arithmetic number, because the mean of its divisors is an integer number (30979728).

Almost surely, 2^121337221 is an apocalyptic number.

It is an amenable number.

121337221 is a deficient number, since it is larger than the sum of its proper divisors (2581691).

121337221 is an equidigital number, since it uses as much as digits as its factorization.

121337221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581690.

The product of its digits is 504, while the sum is 22.

The square root of 121337221 is about 11015.3175623765. The cubic root of 121337221 is about 495.0678014802.

The spelling of 121337221 in words is "one hundred twenty-one million, three hundred thirty-seven thousand, two hundred twenty-one".