102221154 has 72 divisors (see below), whose sum is σ = 268894080. Its totient is φ = 27930672.

The previous prime is 102221149. The next prime is 102221179. The reversal of 102221154 is 451122201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17767 + ... + 22805.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640).

Almost surely, 2^102221154 is an apocalyptic number.

102221154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102221154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134447040).

102221154 is an abundant number, since it is smaller than the sum of its proper divisors (166672926).

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

102221154 is a wasteful number, since it uses less digits than its factorization.

102221154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084 (or 5074 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 102221154 is about 10110.4477645651. The cubic root of 102221154 is about 467.5703101854.

Adding to 102221154 its reverse (451122201), we get a palindrome (553343355).

The spelling of 102221154 in words is "one hundred two million, two hundred twenty-one thousand, one hundred fifty-four".