110421990 has 144 divisors (see below), whose sum is σ = 339532128. Its totient is φ = 24893568.

The previous prime is 110421989. The next prime is 110421991. The reversal of 110421990 is 99124011.

It is an interprime number because it is at equal distance from previous prime (110421989) and next prime (110421991).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110421991) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1512594 + ... + 1512666.

It is an arithmetic number, because the mean of its divisors is an integer number (2357862).

Almost surely, 2^110421990 is an apocalyptic number.

110421990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 110421990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169766064).

110421990 is an abundant number, since it is smaller than the sum of its proper divisors (229110138).

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

110421990 is an frugal number, since it uses more digits than its factorization.

110421990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 110421990 is about 10508.1868083890. The cubic root of 110421990 is about 479.7539103129.

The spelling of 110421990 in words is "one hundred ten million, four hundred twenty-one thousand, nine hundred ninety".