20010100122 has 24 divisors (see below), whose sum is σ = 43372311840. Its totient is φ = 6667403400.

The previous prime is 20010100111. The next prime is 20010100141. The reversal of 20010100122 is 22100101002.

It is a Harshad number since it is a multiple of its sum of digits (9).

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 11 ways as a sum of consecutive naturals, for example, 171972 + ... + 263807.

It is an arithmetic number, because the mean of its divisors is an integer number (1807179660).

Almost surely, 2^20010100122 is an apocalyptic number.

20010100122 is an abundant number, since it is smaller than the sum of its proper divisors (23362211718).

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

20010100122 is a wasteful number, since it uses less digits than its factorization.

20010100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438338 (or 438335 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20010100122 its reverse (22100101002), we get a palindrome (42110201124).

The spelling of 20010100122 in words is "twenty billion, ten million, one hundred thousand, one hundred twenty-two".