10001222000 has 320 divisors, whose sum is σ = 30496048128. Its totient is φ = 3081600000.

The previous prime is 10001221991. The next prime is 10001222017. The reversal of 10001222000 is 22210001.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15553679 + ... + 15554321.

Almost surely, 2^10001222000 is an apocalyptic number.

10001222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10001222000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15248024064).

10001222000 is an abundant number, since it is smaller than the sum of its proper divisors (20494826128).

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

10001222000 is a wasteful number, since it uses less digits than its factorization.

10001222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 10001222000 its reverse (22210001), we get a palindrome (10023432001).

The spelling of 10001222000 in words is "ten billion, one million, two hundred twenty-two thousand".