111627421 has 2 divisors, whose sum is σ = 111627422. Its totient is φ = 111627420.

The previous prime is 111627419. The next prime is 111627431. The reversal of 111627421 is 124726111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 47403225 = 8014^2 + 6885^2 .

It is an emirp because it is prime and its reverse (124726111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111627421 - 2¹ = 111627419 is a prime.

It is a super-2 number, since 2×111627421² = 24921362238222482, which contains 22 as substring.

Together with 111627419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111627431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55813710 + 55813711.

It is an arithmetic number, because the mean of its divisors is an integer number (55813711).

Almost surely, 2^111627421 is an apocalyptic number.

It is an amenable number.

111627421 is a deficient number, since it is larger than the sum of its proper divisors (1).

111627421 is an equidigital number, since it uses as much as digits as its factorization.

111627421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 25.

The square root of 111627421 is about 10565.3878774042. The cubic root of 111627421 is about 481.4933540460.

The spelling of 111627421 in words is "one hundred eleven million, six hundred twenty-seven thousand, four hundred twenty-one".