221221200130 has 48 divisors (see below), whose sum is σ = 463254591096. Its totient is φ = 75839984640.

The previous prime is 221221200091. The next prime is 221221200133. The reversal of 221221200130 is 31002122122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 126197589049 + 95023611081 = 355243^2 + 308259^2 .

It is not an unprimeable number, because it can be changed into a prime (221221200133) 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, 8501740 + ... + 8527720.

Almost surely, 2^221221200130 is an apocalyptic number.

221221200130 is an abundant number, since it is smaller than the sum of its proper divisors (242033390966).

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

221221200130 is a wasteful number, since it uses less digits than its factorization.

221221200130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43379 (or 43372 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221221200130 its reverse (31002122122), we get a palindrome (252223322252).

The spelling of 221221200130 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thousand, one hundred thirty".