820122130 has 8 divisors (see below), whose sum is σ = 1476219852. Its totient is φ = 328048848.

The previous prime is 820122119. The next prime is 820122167. The reversal of 820122130 is 31221028.

It can be written as a sum of positive squares in 2 ways, for example, as 807298569 + 12823561 = 28413^2 + 3581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 820122098 and 820122107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41006097 + ... + 41006116.

Almost surely, 2^820122130 is an apocalyptic number.

820122130 is a deficient number, since it is larger than the sum of its proper divisors (656097722).

820122130 is a wasteful number, since it uses less digits than its factorization.

820122130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82012220.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 820122130 is about 28637.7745294567. The cubic root of 820122130 is about 936.0366284945.

Adding to 820122130 its reverse (31221028), we get a palindrome (851343158).

The spelling of 820122130 in words is "eight hundred twenty million, one hundred twenty-two thousand, one hundred thirty".