20001211121110 has 32 divisors (see below), whose sum is σ = 36090689951232. Its totient is φ = 7980822826080.

The previous prime is 20001211121081. The next prime is 20001211121123. The reversal of 20001211121110 is 1112111210002.

It is a happy number.

It is a super-2 number, since 2×20001211121110² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 21748227 + ... + 22649233.

It is an arithmetic number, because the mean of its divisors is an integer number (1127834060976).

Almost surely, 2^{20001211121110} is an apocalyptic number.

20001211121110 is a deficient number, since it is larger than the sum of its proper divisors (16089478830122).

20001211121110 is a wasteful number, since it uses less digits than its factorization.

20001211121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906468.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20001211121110 its reverse (1112111210002), we get a palindrome (21113322331112).

The spelling of 20001211121110 in words is "twenty trillion, one billion, two hundred eleven million, one hundred twenty-one thousand, one hundred ten".