22194679921129 has 15 divisors (see below), whose sum is σ = 22791695968365. Its totient is φ = 21613030542180.

The previous prime is 22194679921109. The next prime is 22194679921163. The reversal of 22194679921129 is 92112997649122.

The square root of 22194679921129 is 4711123.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 22194679921129 - 2¹⁵ = 22194679888361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22194679921109) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 67053413494 + ... + 67053413824.

It is an arithmetic number, because the mean of its divisors is an integer number (1519446397891).

Almost surely, 2^{22194679921129} is an apocalyptic number.

22194679921129 is the 4711123-rd square number.

22194679921129 is the 2355562-nd centered octagonal number.

It is an amenable number.

22194679921129 is a deficient number, since it is larger than the sum of its proper divisors (597016047236).

22194679921129 is an frugal number, since it uses more digits than its factorization.

22194679921129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 374 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 64.

The spelling of 22194679921129 in words is "twenty-two trillion, one hundred ninety-four billion, six hundred seventy-nine million, nine hundred twenty-one thousand, one hundred twenty-nine".