36211532221 has 4 divisors (see below), whose sum is σ = 36894768732. Its totient is φ = 35528295712.

The previous prime is 36211532213. The next prime is 36211532237. The reversal of 36211532221 is 12223511263.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16766624196 + 19444908025 = 129486^2 + 139445^2 .

It is a cyclic number.

It is not a de Polignac number, because 36211532221 - 2³ = 36211532213 is a prime.

It is a super-2 number, since 2×36211532221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36211532221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36211532521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341618176 + ... + 341618281.

It is an arithmetic number, because the mean of its divisors is an integer number (9223692183).

Almost surely, 2^36211532221 is an apocalyptic number.

It is an amenable number.

36211532221 is a deficient number, since it is larger than the sum of its proper divisors (683236511).

36211532221 is an equidigital number, since it uses as much as digits as its factorization.

36211532221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683236510.

The product of its digits is 4320, while the sum is 28.

The spelling of 36211532221 in words is "thirty-six billion, two hundred eleven million, five hundred thirty-two thousand, two hundred twenty-one".