1220233223100 has 144 divisors (see below), whose sum is σ = 3637556396768. Its totient is φ = 315588648960.

The previous prime is 1220233223093. The next prime is 1220233223159. The reversal of 1220233223100 is 13223320221.

It is a happy number.

It is a super-2 number, since 2×1220233223100² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3298692 + ... + 3649908.

Almost surely, 2^{1220233223100} is an apocalyptic number.

1220233223100 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 1220233223100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818778198384).

1220233223100 is an abundant number, since it is smaller than the sum of its proper divisors (2417323173668).

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

1220233223100 is a wasteful number, since it uses less digits than its factorization.

1220233223100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351584 (or 351577 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1220233223100 its reverse (13223320221), we get a palindrome (1233456543321).

The spelling of 1220233223100 in words is "one trillion, two hundred twenty billion, two hundred thirty-three million, two hundred twenty-three thousand, one hundred".