1222312443100 has 216 divisors, whose sum is σ = 3143056508592. Its totient is φ = 411302707200.

The previous prime is 1222312443091. The next prime is 1222312443137. The reversal of 1222312443100 is 13442132221.

It is a super-2 number, since 2×1222312443100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 90932380 + ... + 90945820.

Almost surely, 2^{1222312443100} is an apocalyptic number.

1222312443100 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 1222312443100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1571528254296).

1222312443100 is an abundant number, since it is smaller than the sum of its proper divisors (1920744065492).

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

1222312443100 is a wasteful number, since it uses less digits than its factorization.

1222312443100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13813 (or 13799 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 1222312443100 its reverse (13442132221), we get a palindrome (1235754575321).

The spelling of 1222312443100 in words is "one trillion, two hundred twenty-two billion, three hundred twelve million, four hundred forty-three thousand, one hundred".