1220001313 has 16 divisors (see below), whose sum is σ = 1250859456. Its totient is φ = 1189656000.

The previous prime is 1220001287. The next prime is 1220001323. The reversal of 1220001313 is 3131000221.

It is a cyclic number.

It is not a de Polignac number, because 1220001313 - 2¹³ = 1219993121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220001293 and 1220001302.

It is not an unprimeable number, because it can be changed into a prime (1220001323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3270595 + ... + 3270967.

It is an arithmetic number, because the mean of its divisors is an integer number (78178716).

Almost surely, 2^1220001313 is an apocalyptic number.

It is an amenable number.

1220001313 is a deficient number, since it is larger than the sum of its proper divisors (30858143).

1220001313 is a wasteful number, since it uses less digits than its factorization.

1220001313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1220001313 is about 34928.5171886812. The cubic root of 1220001313 is about 1068.5301134765.

Adding to 1220001313 its reverse (3131000221), we get a palindrome (4351001534).

The spelling of 1220001313 in words is "one billion, two hundred twenty million, one thousand, three hundred thirteen".