129222331812 has 288 divisors, whose sum is σ = 407637764352. Its totient is φ = 33677549568.

The previous prime is 129222331811. The next prime is 129222331813. The reversal of 129222331812 is 218133222921.

129222331812 is a `hidden beast` number, since 1 + 29 + 222 + 331 + 81 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (129222331811) and next prime (129222331813).

It is a super-2 number, since 2×129222331812² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (129222331811) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18841888 + ... + 18848744.

It is an arithmetic number, because the mean of its divisors is an integer number (1415408904).

Almost surely, 2^129222331812 is an apocalyptic number.

129222331812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129222331812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203818882176).

129222331812 is an abundant number, since it is smaller than the sum of its proper divisors (278415432540).

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

129222331812 is a wasteful number, since it uses less digits than its factorization.

129222331812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7027 (or 7022 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The spelling of 129222331812 in words is "one hundred twenty-nine billion, two hundred twenty-two million, three hundred thirty-one thousand, eight hundred twelve".