1279779197222 has 16 divisors (see below), whose sum is σ = 1943551750752. Its totient is φ = 631977604800.

The previous prime is 1279779197209. The next prime is 1279779197227. The reversal of 1279779197222 is 2227919779721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279779197227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12195383 + ... + 12299874.

It is an arithmetic number, because the mean of its divisors is an integer number (121471984422).

Almost surely, 2^{1279779197222} is an apocalyptic number.

1279779197222 is a deficient number, since it is larger than the sum of its proper divisors (663772553530).

1279779197222 is a wasteful number, since it uses less digits than its factorization.

1279779197222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24495583.

The product of its digits is 28005264, while the sum is 65.

The spelling of 1279779197222 in words is "one trillion, two hundred seventy-nine billion, seven hundred seventy-nine million, one hundred ninety-seven thousand, two hundred twenty-two".