1228118971 has 16 divisors (see below), whose sum is σ = 1325076480. Its totient is φ = 1134920160.

The previous prime is 1228118873. The next prime is 1228118987. The reversal of 1228118971 is 1798118221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228118971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1228112971) 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, 597181 + ... + 599233.

It is an arithmetic number, because the mean of its divisors is an integer number (82817280).

Almost surely, 2^1228118971 is an apocalyptic number.

1228118971 is a deficient number, since it is larger than the sum of its proper divisors (96957509).

1228118971 is a wasteful number, since it uses less digits than its factorization.

1228118971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946.

The product of its digits is 16128, while the sum is 40.

The square root of 1228118971 is about 35044.5284031616. The cubic root of 1228118971 is about 1070.8948088891.

The spelling of 1228118971 in words is "one billion, two hundred twenty-eight million, one hundred eighteen thousand, nine hundred seventy-one".