111221242131420 has 72 divisors (see below), whose sum is σ = 337589748184416. Its totient is φ = 29639776182912.

The previous prime is 111221242131407. The next prime is 111221242131463. The reversal of 111221242131420 is 24131242122111.

111221242131420 is a `hidden beast` number, since 1 + 1 + 1 + 2 + 2 + 1 + 24 + 213 + 1 + 420 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199947727 + ... + 200503206.

Almost surely, 2^{111221242131420} is an apocalyptic number.

111221242131420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221242131420 is an abundant number, since it is smaller than the sum of its proper divisors (226368506052996).

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

111221242131420 is a wasteful number, since it uses less digits than its factorization.

111221242131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400452491 (or 400452486 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

Adding to 111221242131420 its reverse (24131242122111), we get a palindrome (135352484253531).

The spelling of 111221242131420 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred forty-two million, one hundred thirty-one thousand, four hundred twenty".