1216361217026 has 32 divisors (see below), whose sum is σ = 1913252685120. Its totient is φ = 579524231104.

The previous prime is 1216361217013. The next prime is 1216361217041. The reversal of 1216361217026 is 6207121636121.

It is a super-2 number, since 2×1216361217026² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652565 + ... + 1690728.

It is an arithmetic number, because the mean of its divisors is an integer number (59789146410).

Almost surely, 2^{1216361217026} is an apocalyptic number.

1216361217026 is a deficient number, since it is larger than the sum of its proper divisors (696891468094).

1216361217026 is a wasteful number, since it uses less digits than its factorization.

1216361217026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343490.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 1216361217026 in words is "one trillion, two hundred sixteen billion, three hundred sixty-one million, two hundred seventeen thousand, twenty-six".