121223021 has 8 divisors (see below), whose sum is σ = 127768320. Its totient is φ = 114694272.

The previous prime is 121223017. The next prime is 121223027. The reversal of 121223021 is 120322121.

It is a happy number.

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 121223021 - 2² = 121223017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121222987 and 121223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223027) 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, 12701 + ... + 20093.

It is an arithmetic number, because the mean of its divisors is an integer number (15971040).

Almost surely, 2^121223021 is an apocalyptic number.

It is an amenable number.

121223021 is a deficient number, since it is larger than the sum of its proper divisors (6545299).

121223021 is an equidigital number, since it uses as much as digits as its factorization.

121223021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121223021 is about 11010.1326513353. The cubic root of 121223021 is about 494.9124369823.

Adding to 121223021 its reverse (120322121), we get a palindrome (241545142).

The spelling of 121223021 in words is "one hundred twenty-one million, two hundred twenty-three thousand, twenty-one".