1321222541 has 8 divisors (see below), whose sum is σ = 1400177664. Its totient is φ = 1242404800.

The previous prime is 1321222517. The next prime is 1321222549. The reversal of 1321222541 is 1452221231.

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 1321222541 - 2¹⁸ = 1320960397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321222549) 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, 14195 + ... + 53328.

It is an arithmetic number, because the mean of its divisors is an integer number (175022208).

Almost surely, 2^1321222541 is an apocalyptic number.

It is an amenable number.

1321222541 is a deficient number, since it is larger than the sum of its proper divisors (78955123).

1321222541 is a wasteful number, since it uses less digits than its factorization.

1321222541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68691.

The product of its digits is 960, while the sum is 23.

The square root of 1321222541 is about 36348.6250221380. The cubic root of 1321222541 is about 1097.2998625999.

Adding to 1321222541 its reverse (1452221231), we get a palindrome (2773443772).

It can be divided in two parts, 13212 and 22541, that added together give a palindrome (35753).

The spelling of 1321222541 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, five hundred forty-one".