1220302101 has 4 divisors (see below), whose sum is σ = 1627069472. Its totient is φ = 813534732.

The previous prime is 1220302081. The next prime is 1220302129. The reversal of 1220302101 is 1012030221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1220302101 - 2¹⁸ = 1220039957 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 (1220302201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203383681 + ... + 203383686.

It is an arithmetic number, because the mean of its divisors is an integer number (406767368).

Almost surely, 2^1220302101 is an apocalyptic number.

It is an amenable number.

1220302101 is a deficient number, since it is larger than the sum of its proper divisors (406767371).

1220302101 is an equidigital number, since it uses as much as digits as its factorization.

1220302101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406767370.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1220302101 is about 34932.8226886978. The cubic root of 1220302101 is about 1068.6179206568.

Adding to 1220302101 its reverse (1012030221), we get a palindrome (2232332322).

The spelling of 1220302101 in words is "one billion, two hundred twenty million, three hundred two thousand, one hundred one".