1021223221100 has 36 divisors (see below), whose sum is σ = 2218322825544. Its totient is φ = 408071143680.

The previous prime is 1021223221091. The next prime is 1021223221103. The reversal of 1021223221100 is 11223221201.

It is not an unprimeable number, because it can be changed into a prime (1021223221103) 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, 5128622 + ... + 5324021.

Almost surely, 2^{1021223221100} is an apocalyptic number.

1021223221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021223221100 is an abundant number, since it is smaller than the sum of its proper divisors (1197099604444).

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

1021223221100 is a wasteful number, since it uses less digits than its factorization.

1021223221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453634 (or 10453627 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1021223221100 its reverse (11223221201), we get a palindrome (1032446442301).

The spelling of 1021223221100 in words is "one trillion, twenty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, one hundred".