111020421 has 8 divisors (see below), whose sum is σ = 156734784. Its totient is φ = 69659840.

The previous prime is 111020419. The next prime is 111020423. The reversal of 111020421 is 124020111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111020419) and next prime (111020423).

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 111020421 - 2¹ = 111020419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111020397 and 111020406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020423) 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, 1088385 + ... + 1088486.

It is an arithmetic number, because the mean of its divisors is an integer number (19591848).

Almost surely, 2^111020421 is an apocalyptic number.

It is an amenable number.

111020421 is a deficient number, since it is larger than the sum of its proper divisors (45714363).

111020421 is a wasteful number, since it uses less digits than its factorization.

111020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176891.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 111020421 is about 10536.6228460546. The cubic root of 111020421 is about 480.6190233930.

Adding to 111020421 its reverse (124020111), we get a palindrome (235040532).

The spelling of 111020421 in words is "one hundred eleven million, twenty thousand, four hundred twenty-one".