1321222031 has 8 divisors (see below), whose sum is σ = 1418645664. Its totient is φ = 1225987840.

The previous prime is 1321222013. The next prime is 1321222037. The reversal of 1321222031 is 1302221231.

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 1321222031 - 2²² = 1317027727 is a prime.

It is a super-2 number, since 2×1321222031² = 3491255310399529922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321222037) 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, 546110 + ... + 548523.

It is an arithmetic number, because the mean of its divisors is an integer number (177330708).

Almost surely, 2^1321222031 is an apocalyptic number.

1321222031 is a deficient number, since it is larger than the sum of its proper divisors (97423633).

1321222031 is a wasteful number, since it uses less digits than its factorization.

1321222031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094721.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321222031 is about 36348.6180067413. The cubic root of 1321222031 is about 1097.2997214117.

Adding to 1321222031 its reverse (1302221231), we get a palindrome (2623443262).

The spelling of 1321222031 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, thirty-one".