121232420 has 12 divisors (see below), whose sum is σ = 254588124. Its totient is φ = 48492960.

The previous prime is 121232401. The next prime is 121232453. The reversal of 121232420 is 24232121.

121232420 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 89264704 + 31967716 = 9448^2 + 5654^2 .

121232420 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030791 + ... + 3030830.

It is an arithmetic number, because the mean of its divisors is an integer number (21215677).

Almost surely, 2^121232420 is an apocalyptic number.

121232420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121232420 is an abundant number, since it is smaller than the sum of its proper divisors (133355704).

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

121232420 is a wasteful number, since it uses less digits than its factorization.

121232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6061630 (or 6061628 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 121232420 is about 11010.5594771565. The cubic root of 121232420 is about 494.9252276270.

Adding to 121232420 its reverse (24232121), we get a palindrome (145464541).

The spelling of 121232420 in words is "one hundred twenty-one million, two hundred thirty-two thousand, four hundred twenty".