221000031130 has 16 divisors (see below), whose sum is σ = 404321369544. Its totient is φ = 86950831680.

The previous prime is 221000031121. The next prime is 221000031139. The reversal of 221000031130 is 31130000122.

It is an interprime number because it is at equal distance from previous prime (221000031121) and next prime (221000031139).

It can be written as a sum of positive squares in 4 ways, for example, as 80368281049 + 140631750081 = 283493^2 + 375009^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221000031130.

It is not an unprimeable number, because it can be changed into a prime (221000031139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181146957 + ... + 181148176.

Almost surely, 2^221000031130 is an apocalyptic number.

221000031130 is a deficient number, since it is larger than the sum of its proper divisors (183321338414).

221000031130 is a wasteful number, since it uses less digits than its factorization.

221000031130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362295201.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 221000031130 its reverse (31130000122), we get a palindrome (252130031252).

The spelling of 221000031130 in words is "two hundred twenty-one billion, thirty-one thousand, one hundred thirty".