1216700023 has 16 divisors (see below), whose sum is σ = 1582880256. Its totient is φ = 906855840.

The previous prime is 1216700021. The next prime is 1216700027. The reversal of 1216700023 is 3200076121.

It is not a de Polignac number, because 1216700023 - 2¹ = 1216700021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1216699967 and 1216700003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216700021) 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, 341736 + ... + 345277.

It is an arithmetic number, because the mean of its divisors is an integer number (98930016).

Almost surely, 2^1216700023 is an apocalyptic number.

1216700023 is a deficient number, since it is larger than the sum of its proper divisors (366180233).

1216700023 is a wasteful number, since it uses less digits than its factorization.

1216700023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687054.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1216700023 is about 34881.2273723274. The cubic root of 1216700023 is about 1067.5654384579.

Adding to 1216700023 its reverse (3200076121), we get a palindrome (4416776144).

The spelling of 1216700023 in words is "one billion, two hundred sixteen million, seven hundred thousand, twenty-three".