101222490 has 32 divisors (see below), whose sum is σ = 248106240. Its totient is φ = 26417984.

The previous prime is 101222489. The next prime is 101222501. The reversal of 101222490 is 94222101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34485 + ... + 37304.

It is an arithmetic number, because the mean of its divisors is an integer number (7753320).

Almost surely, 2^101222490 is an apocalyptic number.

101222490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101222490 is an abundant number, since it is smaller than the sum of its proper divisors (146883750).

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

101222490 is a wasteful number, since it uses less digits than its factorization.

101222490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71846.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 101222490 is about 10060.9388229926. The cubic root of 101222490 is about 466.0426597404.

Adding to 101222490 its reverse (94222101), we get a palindrome (195444591).

The spelling of 101222490 in words is "one hundred one million, two hundred twenty-two thousand, four hundred ninety".