121031424 has 108 divisors (see below), whose sum is σ = 352504152. Its totient is φ = 39936000.

The previous prime is 121031399. The next prime is 121031429. The reversal of 121031424 is 424130121.

121031424 is a `hidden beast` number, since 1 + 210 + 31 + 424 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121031397 and 121031406.

It is not an unprimeable number, because it can be changed into a prime (121031429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301624 + ... + 302024.

Almost surely, 2^121031424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121031424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176252076).

121031424 is an abundant number, since it is smaller than the sum of its proper divisors (231472728).

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

121031424 is a wasteful number, since it uses less digits than its factorization.

121031424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121031424 is about 11001.4282709110. The cubic root of 121031424 is about 494.6515576579.

Adding to 121031424 its reverse (424130121), we get a palindrome (545161545).

The spelling of 121031424 in words is "one hundred twenty-one million, thirty-one thousand, four hundred twenty-four".