213211221100 has 36 divisors (see below), whose sum is σ = 462767212600. Its totient is φ = 85266264960.

The previous prime is 213211221079. The next prime is 213211221121. The reversal of 213211221100 is 1122112312.

It is an interprime number because it is at equal distance from previous prime (213211221079) and next prime (213211221121).

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, 247471 + ... + 698329.

Almost surely, 2^213211221100 is an apocalyptic number.

213211221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213211221100 is an abundant number, since it is smaller than the sum of its proper divisors (249555991500).

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

213211221100 is a wasteful number, since it uses less digits than its factorization.

213211221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455602 (or 455595 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 213211221100 its reverse (1122112312), we get a palindrome (214333333412).

It can be divided in two parts, 21321 and 1221100, that added together give a palindrome (1242421).

The spelling of 213211221100 in words is "two hundred thirteen billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".