20001012012222 has 64 divisors (see below), whose sum is σ = 42802758802944. Its totient is φ = 6208538480640.

The previous prime is 20001012012199. The next prime is 20001012012271. The reversal of 20001012012222 is 22221021010002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38436993 + ... + 38953875.

It is an arithmetic number, because the mean of its divisors is an integer number (668793106296).

Almost surely, 2^{20001012012222} is an apocalyptic number.

20001012012222 is an abundant number, since it is smaller than the sum of its proper divisors (22801746790722).

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

20001012012222 is a wasteful number, since it uses less digits than its factorization.

20001012012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520913.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20001012012222 its reverse (22221021010002), we get a palindrome (42222033022224).

The spelling of 20001012012222 in words is "twenty trillion, one billion, twelve million, twelve thousand, two hundred twenty-two".