1221300101 has 8 divisors (see below), whose sum is σ = 1398802944. Its totient is φ = 1044555120.

The previous prime is 1221300083. The next prime is 1221300109. The reversal of 1221300101 is 1010031221.

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

It is not a de Polignac number, because 1221300101 - 2⁶ = 1221300037 is a prime.

It is a super-2 number, since 2×1221300101² = 2983147873405220402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221300109) 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, 186005 + ... + 192458.

It is an arithmetic number, because the mean of its divisors is an integer number (174850368).

Almost surely, 2^1221300101 is an apocalyptic number.

It is an amenable number.

1221300101 is a deficient number, since it is larger than the sum of its proper divisors (177502843).

1221300101 is an equidigital number, since it uses as much as digits as its factorization.

1221300101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378931.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1221300101 is about 34947.1043292574. The cubic root of 1221300101 is about 1068.9091573057.

Adding to 1221300101 its reverse (1010031221), we get a palindrome (2231331322).

The spelling of 1221300101 in words is "one billion, two hundred twenty-one million, three hundred thousand, one hundred one".