1220321541 has 8 divisors (see below), whose sum is σ = 1679582464. Its totient is φ = 787304160.

The previous prime is 1220321539. The next prime is 1220321549. The reversal of 1220321541 is 1451230221.

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

It is not a de Polignac number, because 1220321541 - 2¹ = 1220321539 is a prime.

It is a super-2 number, since 2×1220321541² = 2978369326857229362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220321549) 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, 6560776 + ... + 6560961.

It is an arithmetic number, because the mean of its divisors is an integer number (209947808).

Almost surely, 2^1220321541 is an apocalyptic number.

It is an amenable number.

1220321541 is a deficient number, since it is larger than the sum of its proper divisors (459260923).

1220321541 is a wasteful number, since it uses less digits than its factorization.

1220321541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13121771.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1220321541 is about 34933.1009359318. The cubic root of 1220321541 is about 1068.6235951593.

Adding to 1220321541 its reverse (1451230221), we get a palindrome (2671551762).

The spelling of 1220321541 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, five hundred forty-one".