21161014512222 has 64 divisors (see below), whose sum is σ = 47049577795584. Its totient is φ = 6300810270720.

The previous prime is 21161014512203. The next prime is 21161014512229. The reversal of 21161014512222 is 22221541016112.

It is a self number, because there is not a number n which added to its sum of digits gives 21161014512222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161014512229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70666558 + ... + 70965374.

It is an arithmetic number, because the mean of its divisors is an integer number (735149653056).

Almost surely, 2^{21161014512222} is an apocalyptic number.

21161014512222 is an abundant number, since it is smaller than the sum of its proper divisors (25888563283362).

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

21161014512222 is a wasteful number, since it uses less digits than its factorization.

21161014512222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328153.

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 21161014512222 its reverse (22221541016112), we get a palindrome (43382555528334).

The spelling of 21161014512222 in words is "twenty-one trillion, one hundred sixty-one billion, fourteen million, five hundred twelve thousand, two hundred twenty-two".