129302221840 has 40 divisors (see below), whose sum is σ = 327957455808. Its totient is φ = 47018989440.

The previous prime is 129302221777. The next prime is 129302221871. The reversal of 129302221840 is 48122203921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 129302221796 and 129302221805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73466292 + ... + 73468051.

Almost surely, 2^129302221840 is an apocalyptic number.

129302221840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129302221840 is an abundant number, since it is smaller than the sum of its proper divisors (198655233968).

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

129302221840 is a wasteful number, since it uses less digits than its factorization.

129302221840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146934367 (or 146934361 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 129302221840 in words is "one hundred twenty-nine billion, three hundred two million, two hundred twenty-one thousand, eight hundred forty".