121223120 has 40 divisors (see below), whose sum is σ = 282315264. Its totient is φ = 48408192.

The previous prime is 121223117. The next prime is 121223147. The reversal of 121223120 is 21322121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 121223095 and 121223104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76577 + ... + 78143.

Almost surely, 2^121223120 is an apocalyptic number.

121223120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121223120 is an abundant number, since it is smaller than the sum of its proper divisors (161092144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121223120 is a wasteful number, since it uses less digits than its factorization.

121223120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547 (or 2541 counting only the distinct ones).

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

The square root of 121223120 is about 11010.1371471930. The cubic root of 121223120 is about 494.9125717101.

Adding to 121223120 its reverse (21322121), we get a palindrome (142545241).

Subtracting from 121223120 its reverse (21322121), we obtain a palindrome (99900999).

The spelling of 121223120 in words is "one hundred twenty-one million, two hundred twenty-three thousand, one hundred twenty".