121244421 has 16 divisors (see below), whose sum is σ = 166037760. Its totient is φ = 78650880.

The previous prime is 121244419. The next prime is 121244423. The reversal of 121244421 is 124442121.

It is an interprime number because it is at equal distance from previous prime (121244419) and next prime (121244423).

It is not a de Polignac number, because 121244421 - 2¹ = 121244419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121244423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55885 + ... + 58013.

It is an arithmetic number, because the mean of its divisors is an integer number (10377360).

Almost surely, 2^121244421 is an apocalyptic number.

It is an amenable number.

121244421 is a deficient number, since it is larger than the sum of its proper divisors (44793339).

121244421 is a wasteful number, since it uses less digits than its factorization.

121244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its digits is 512, while the sum is 21.

The square root of 121244421 is about 11011.1044405182. The cubic root of 121244421 is about 494.9415582468.

Adding to 121244421 its reverse (124442121), we get a palindrome (245686542).

The spelling of 121244421 in words is "one hundred twenty-one million, two hundred forty-four thousand, four hundred twenty-one".