122720810 has 32 divisors (see below), whose sum is σ = 233107200. Its totient is φ = 46388160.

The previous prime is 122720711. The next prime is 122720813. The reversal of 122720810 is 18027221.

It is a super-2 number, since 2×122720810² = 30120794414112200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122720813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134255 + ... + 135165.

It is an arithmetic number, because the mean of its divisors is an integer number (7284600).

Almost surely, 2^122720810 is an apocalyptic number.

122720810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122720810 is a deficient number, since it is larger than the sum of its proper divisors (110386390).

122720810 is a wasteful number, since it uses less digits than its factorization.

122720810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 122720810 is about 11077.9424984967. The cubic root of 122720810 is about 496.9424205285.

The spelling of 122720810 in words is "one hundred twenty-two million, seven hundred twenty thousand, eight hundred ten".