221000012231 has 2 divisors, whose sum is σ = 221000012232. Its totient is φ = 221000012230.

The previous prime is 221000012213. The next prime is 221000012251. The reversal of 221000012231 is 132210000122.

It is a happy number.

Together with previous prime (221000012213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221000012231 - 2¹⁴ = 220999995847 is a prime.

It is a super-2 number, since 2×221000012231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221000012251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500006115 + 110500006116.

It is an arithmetic number, because the mean of its divisors is an integer number (110500006116).

Almost surely, 2^221000012231 is an apocalyptic number.

221000012231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000012231 is an equidigital number, since it uses as much as digits as its factorization.

221000012231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 221000012231 its reverse (132210000122), we get a palindrome (353210012353).

The spelling of 221000012231 in words is "two hundred twenty-one billion, twelve thousand, two hundred thirty-one".