1222216486900 has 36 divisors (see below), whose sum is σ = 2743665292620. Its totient is φ = 472028435200.

The previous prime is 1222216486877. The next prime is 1222216486901. The reversal of 1222216486900 is 96846122221.

It can be written as a sum of positive squares in 6 ways, for example, as 119796285456 + 1102420201444 = 346116^2 + 1049962^2 .

It is a super-2 number, since 2×1222216486900² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222216486901) 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, 210724081 + ... + 210729880.

It is an arithmetic number, because the mean of its divisors is an integer number (76212924795).

Almost surely, 2^{1222216486900} is an apocalyptic number.

1222216486900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222216486900 is an abundant number, since it is smaller than the sum of its proper divisors (1521448805720).

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

1222216486900 is a wasteful number, since it uses less digits than its factorization.

1222216486900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421454004 (or 421453997 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 1222216486900 in words is "one trillion, two hundred twenty-two billion, two hundred sixteen million, four hundred eighty-six thousand, nine hundred".