211221144203300 has 72 divisors (see below), whose sum is σ = 571449204701760. Its totient is φ = 65835161827200.

The previous prime is 211221144203243. The next prime is 211221144203309. The reversal of 211221144203300 is 3302441122112.

It is a happy number.

It is a super-2 number, since 2×211221144203300² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221144203300.

It is not an unprimeable number, because it can be changed into a prime (211221144203309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13715651015 + ... + 13715666414.

Almost surely, 2^{211221144203300} is an apocalyptic number.

211221144203300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211221144203300 is an abundant number, since it is smaller than the sum of its proper divisors (360228060498460).

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

211221144203300 is a wasteful number, since it uses less digits than its factorization.

211221144203300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27431317461 (or 27431317454 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 211221144203300 its reverse (3302441122112), we get a palindrome (214523585325412).

The spelling of 211221144203300 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred forty-four million, two hundred three thousand, three hundred".