1216130061 has 8 divisors (see below), whose sum is σ = 1621892160. Its totient is φ = 810560672.

The previous prime is 1216130057. The next prime is 1216130119. The reversal of 1216130061 is 1600316121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216130061 - 2² = 1216130057 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216130021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32745 + ... + 59198.

It is an arithmetic number, because the mean of its divisors is an integer number (202736520).

Almost surely, 2^1216130061 is an apocalyptic number.

It is an amenable number.

1216130061 is a deficient number, since it is larger than the sum of its proper divisors (405762099).

1216130061 is an equidigital number, since it uses as much as digits as its factorization.

1216130061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96355.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1216130061 is about 34873.0563759473. The cubic root of 1216130061 is about 1067.3987124070.

Adding to 1216130061 its reverse (1600316121), we get a palindrome (2816446182).

The spelling of 1216130061 in words is "one billion, two hundred sixteen million, one hundred thirty thousand, sixty-one".