129220914220 has 48 divisors (see below), whose sum is σ = 278174258208. Its totient is φ = 50395484160.

The previous prime is 129220914211. The next prime is 129220914239. The reversal of 129220914220 is 22419022921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344140 + ... + 613900.

It is an arithmetic number, because the mean of its divisors is an integer number (5795297046).

Almost surely, 2^129220914220 is an apocalyptic number.

129220914220 is a gapful number since it is divisible by the number (10) 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 129220914220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139087129104).

129220914220 is an abundant number, since it is smaller than the sum of its proper divisors (148953343988).

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

129220914220 is a wasteful number, since it uses less digits than its factorization.

129220914220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270370 (or 270368 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 129220914220 in words is "one hundred twenty-nine billion, two hundred twenty million, nine hundred fourteen thousand, two hundred twenty".