102621222 has 64 divisors (see below), whose sum is σ = 256849920. Its totient is φ = 30088800.

The previous prime is 102621203. The next prime is 102621251. The reversal of 102621222 is 222126201.

It is a super-2 number, since 2×102621222² = 21062230409546568, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 102621195 and 102621204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15628 + ... + 21200.

It is an arithmetic number, because the mean of its divisors is an integer number (4013280).

Almost surely, 2^102621222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102621222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128424960).

102621222 is an abundant number, since it is smaller than the sum of its proper divisors (154228698).

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

102621222 is a wasteful number, since it uses less digits than its factorization.

102621222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626 (or 5620 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 102621222 is about 10130.2133245061. The cubic root of 102621222 is about 468.1795005064.

Adding to 102621222 its reverse (222126201), we get a palindrome (324747423).

The spelling of 102621222 in words is "one hundred two million, six hundred twenty-one thousand, two hundred twenty-two".