1220321151 has 36 divisors (see below), whose sum is σ = 2126144592. Its totient is φ = 660612672.

The previous prime is 1220321101. The next prime is 1220321177. The reversal of 1220321151 is 1511230221.

It is not a de Polignac number, because 1220321151 - 2⁷ = 1220321023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220321101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4086 + ... + 49571.

It is an arithmetic number, because the mean of its divisors is an integer number (59059572).

Almost surely, 2^1220321151 is an apocalyptic number.

1220321151 is a deficient number, since it is larger than the sum of its proper divisors (905823441).

1220321151 is a wasteful number, since it uses less digits than its factorization.

1220321151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53708 (or 53686 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1220321151 is about 34933.0953538332. The cubic root of 1220321151 is about 1068.6234813196.

Adding to 1220321151 its reverse (1511230221), we get a palindrome (2731551372).

The spelling of 1220321151 in words is "one billion, two hundred twenty million, three hundred twenty-one thousand, one hundred fifty-one".