36216889291221 has 64 divisors (see below), whose sum is σ = 51937274188800. Its totient is φ = 22382119397376.

The previous prime is 36216889291217. The next prime is 36216889291277. The reversal of 36216889291221 is 12219298861263.

It is not a de Polignac number, because 36216889291221 - 2² = 36216889291217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36216889271221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 281378346 + ... + 281507028.

It is an arithmetic number, because the mean of its divisors is an integer number (811519909200).

Almost surely, 2^{36216889291221} is an apocalyptic number.

It is an amenable number.

36216889291221 is a deficient number, since it is larger than the sum of its proper divisors (15720384897579).

36216889291221 is a wasteful number, since it uses less digits than its factorization.

36216889291221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129378.

The product of its digits is 8957952, while the sum is 60.

The spelling of 36216889291221 in words is "thirty-six trillion, two hundred sixteen billion, eight hundred eighty-nine million, two hundred ninety-one thousand, two hundred twenty-one".