221202201000 has 256 divisors, whose sum is σ = 785628979200. Its totient is φ = 51293088000.

The previous prime is 221202200993. The next prime is 221202201007. The reversal of 221202201000 is 102202122.

It is an interprime number because it is at equal distance from previous prime (221202200993) and next prime (221202201007).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (221202201007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 613281 + ... + 904719.

It is an arithmetic number, because the mean of its divisors is an integer number (3068863200).

Almost surely, 2^221202201000 is an apocalyptic number.

221202201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221202201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (392814489600).

221202201000 is an abundant number, since it is smaller than the sum of its proper divisors (564426778200).

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

221202201000 is a wasteful number, since it uses less digits than its factorization.

221202201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291497 (or 291483 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221202201000 its reverse (102202122), we get a palindrome (221304403122).

The spelling of 221202201000 in words is "two hundred twenty-one billion, two hundred two million, two hundred one thousand".