111121023421 has 8 divisors (see below), whose sum is σ = 113741802944. Its totient is φ = 108501906240.

The previous prime is 111121023373. The next prime is 111121023449. The reversal of 111121023421 is 124320121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111121023421 - 2¹⁵ = 111120990653 is a prime.

It is a super-2 number, since 2×111121023421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121023451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279801 + ... + 548206.

It is an arithmetic number, because the mean of its divisors is an integer number (14217725368).

Almost surely, 2^111121023421 is an apocalyptic number.

It is an amenable number.

111121023421 is a deficient number, since it is larger than the sum of its proper divisors (2620779523).

111121023421 is an equidigital number, since it uses as much as digits as its factorization.

111121023421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831171.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 111121023421 its reverse (124320121111), we get a palindrome (235441144532).

The spelling of 111121023421 in words is "one hundred eleven billion, one hundred twenty-one million, twenty-three thousand, four hundred twenty-one".