129877677122 has 6 divisors (see below), whose sum is σ = 194817280179. Its totient is φ = 64938583730.

The previous prime is 129877677119. The next prime is 129877677191. The reversal of 129877677122 is 221776778921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64938838561 + 64938838561 = 254831^2 + 254831^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=254831.

It is a super-2 number, since 2×129877677122² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 382247 + ... + 637077.

Almost surely, 2^129877677122 is an apocalyptic number.

129877677122 is a deficient number, since it is larger than the sum of its proper divisors (64939603057).

129877677122 is an frugal number, since it uses more digits than its factorization.

129877677122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509664 (or 254833 counting only the distinct ones).

The product of its digits is 8297856, while the sum is 59.

The spelling of 129877677122 in words is "one hundred twenty-nine billion, eight hundred seventy-seven million, six hundred seventy-seven thousand, one hundred twenty-two".