1221011301 has 8 divisors (see below), whose sum is σ = 1635316480. Its totient is φ = 810356832.

The previous prime is 1221011293. The next prime is 1221011303. The reversal of 1221011301 is 1031101221.

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

It is not a de Polignac number, because 1221011301 - 2³ = 1221011293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221011303) 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, 911896 + ... + 913233.

It is an arithmetic number, because the mean of its divisors is an integer number (204414560).

Almost surely, 2^1221011301 is an apocalyptic number.

It is an amenable number.

1221011301 is a deficient number, since it is larger than the sum of its proper divisors (414305179).

1221011301 is a wasteful number, since it uses less digits than its factorization.

1221011301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825355.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1221011301 is about 34942.9721260227. The cubic root of 1221011301 is about 1068.8248959243.

Adding to 1221011301 its reverse (1031101221), we get a palindrome (2252112522).

The spelling of 1221011301 in words is "one billion, two hundred twenty-one million, eleven thousand, three hundred one".