10001001222 has 24 divisors (see below), whose sum is σ = 21720567960. Its totient is φ = 3325708320.

The previous prime is 10001001221. The next prime is 10001001223. The reversal of 10001001222 is 22210010001.

It is an interprime number because it is at equal distance from previous prime (10001001221) and next prime (10001001223).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001001221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655479 + ... + 670562.

It is an arithmetic number, because the mean of its divisors is an integer number (905023665).

Almost surely, 2^10001001222 is an apocalyptic number.

10001001222 is an abundant number, since it is smaller than the sum of its proper divisors (11719566738).

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

10001001222 is a wasteful number, since it uses less digits than its factorization.

10001001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326468 (or 1326465 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10001001222 its reverse (22210010001), we get a palindrome (32211011223).

The spelling of 10001001222 in words is "ten billion, one million, one thousand, two hundred twenty-two".