20011210212122 has 16 divisors (see below), whose sum is σ = 30026882571840. Its totient is φ = 10002249733728.

The previous prime is 20011210212073. The next prime is 20011210212127. The reversal of 20011210212122 is 22121201211002.

It is a self number, because there is not a number n which added to its sum of digits gives 20011210212122.

It is not an unprimeable number, because it can be changed into a prime (20011210212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117588518 + ... + 117758574.

It is an arithmetic number, because the mean of its divisors is an integer number (1876680160740).

Almost surely, 2^{20011210212122} is an apocalyptic number.

20011210212122 is a deficient number, since it is larger than the sum of its proper divisors (10015672359718).

20011210212122 is a wasteful number, since it uses less digits than its factorization.

20011210212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189445.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20011210212122 its reverse (22121201211002), we get a palindrome (42132411423124).

The spelling of 20011210212122 in words is "twenty trillion, eleven billion, two hundred ten million, two hundred twelve thousand, one hundred twenty-two".