213221221100 has 36 divisors (see below), whose sum is σ = 478644885600. Its totient is φ = 82347504960.

The previous prime is 213221221063. The next prime is 213221221139. The reversal of 213221221100 is 1122122312.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36759380 + ... + 36765179.

Almost surely, 2^213221221100 is an apocalyptic number.

213221221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213221221100 is an abundant number, since it is smaller than the sum of its proper divisors (265423664500).

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

213221221100 is a wasteful number, since it uses less digits than its factorization.

213221221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73524602 (or 73524595 counting only the distinct ones).

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

Adding to 213221221100 its reverse (1122122312), we get a palindrome (214343343412).

The spelling of 213221221100 in words is "two hundred thirteen billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred".