10201231221 has 4 divisors (see below), whose sum is σ = 13601641632. Its totient is φ = 6800820812.

The previous prime is 10201231199. The next prime is 10201231237. The reversal of 10201231221 is 12213210201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12213210201 = 3 ⋅4071070067.

It is a cyclic number.

It is not a de Polignac number, because 10201231221 - 2⁷ = 10201231093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10201231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10201231241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1700205201 + ... + 1700205206.

It is an arithmetic number, because the mean of its divisors is an integer number (3400410408).

Almost surely, 2^10201231221 is an apocalyptic number.

It is an amenable number.

10201231221 is a deficient number, since it is larger than the sum of its proper divisors (3400410411).

10201231221 is an equidigital number, since it uses as much as digits as its factorization.

10201231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400410410.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10201231221 its reverse (12213210201), we get a palindrome (22414441422).

The spelling of 10201231221 in words is "ten billion, two hundred one million, two hundred thirty-one thousand, two hundred twenty-one".