1112121420 has 48 divisors (see below), whose sum is σ = 3156609120. Its totient is φ = 292502016.

The previous prime is 1112121407. The next prime is 1112121421. The reversal of 1112121420 is 241212111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1112121420.

It is not an unprimeable number, because it can be changed into a prime (1112121421) 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, 122575 + ... + 131334.

It is an arithmetic number, because the mean of its divisors is an integer number (65762690).

Almost surely, 2^1112121420 is an apocalyptic number.

1112121420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112121420 is an abundant number, since it is smaller than the sum of its proper divisors (2044487700).

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

1112121420 is a wasteful number, since it uses less digits than its factorization.

1112121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253994 (or 253992 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1112121420 is about 33348.4845232883. The cubic root of 1112121420 is about 1036.0580000126.

Adding to 1112121420 its reverse (241212111), we get a palindrome (1353333531).

The spelling of 1112121420 in words is "one billion, one hundred twelve million, one hundred twenty-one thousand, four hundred twenty".