1222213202100 has 216 divisors, whose sum is σ = 4281162238080. Its totient is φ = 289067328000.

The previous prime is 1222213202083. The next prime is 1222213202101. The reversal of 1222213202100 is 12023122221.

1222213202100 is a `hidden beast` number, since 1 + 22 + 221 + 320 + 2 + 100 = 666.

It is a super-2 number, since 2×1222213202100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222213202101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1099660 + ... + 1911459.

Almost surely, 2^{1222213202100} is an apocalyptic number.

1222213202100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222213202100 is an abundant number, since it is smaller than the sum of its proper divisors (3058949035980).

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

1222213202100 is a wasteful number, since it uses less digits than its factorization.

1222213202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011191 (or 3011181 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1222213202100 its reverse (12023122221), we get a palindrome (1234236324321).

The spelling of 1222213202100 in words is "one trillion, two hundred twenty-two billion, two hundred thirteen million, two hundred two thousand, one hundred".