1216050020 has 96 divisors (see below), whose sum is σ = 2804336640. Its totient is φ = 441492480.

The previous prime is 1216049969. The next prime is 1216050041. The reversal of 1216050020 is 200506121.

It is a super-2 number, since 2×1216050020² = 2957555302284000800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 754976 + ... + 756584.

It is an arithmetic number, because the mean of its divisors is an integer number (29211840).

Almost surely, 2^1216050020 is an apocalyptic number.

1216050020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216050020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1402168320).

1216050020 is an abundant number, since it is smaller than the sum of its proper divisors (1588286620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216050020 is a wasteful number, since it uses less digits than its factorization.

1216050020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1216050020 is about 34871.9087518880. The cubic root of 1216050020 is about 1067.3752945349.

Adding to 1216050020 its reverse (200506121), we get a palindrome (1416556141).

The spelling of 1216050020 in words is "one billion, two hundred sixteen million, fifty thousand, twenty".