1231222201 has 8 divisors (see below), whose sum is σ = 1353729024. Its totient is φ = 1110478320.

The previous prime is 1231222183. The next prime is 1231222241. The reversal of 1231222201 is 1022221321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231222201 - 2¹⁹ = 1230697913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231222241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439270 + ... + 442063.

It is an arithmetic number, because the mean of its divisors is an integer number (169216128).

Almost surely, 2^1231222201 is an apocalyptic number.

1231222201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231222201 is a deficient number, since it is larger than the sum of its proper divisors (122506823).

1231222201 is a wasteful number, since it uses less digits than its factorization.

1231222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881471.

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

The square root of 1231222201 is about 35088.7759974611. The cubic root of 1231222201 is about 1071.7960347566.

Adding to 1231222201 its reverse (1022221321), we get a palindrome (2253443522).

It can be divided in two parts, 12 and 31222201, that added together give a palindrome (31222213).

The spelling of 1231222201 in words is "one billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred one".