20121011111210 has 32 divisors (see below), whose sum is σ = 36378133102080. Its totient is φ = 8012817364608.

The previous prime is 20121011111119. The next prime is 20121011111231. The reversal of 20121011111210 is 1211111012102.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1854239 + ... + 6609101.

It is an arithmetic number, because the mean of its divisors is an integer number (1136816659440).

Almost surely, 2^{20121011111210} is an apocalyptic number.

20121011111210 is a deficient number, since it is larger than the sum of its proper divisors (16257121990870).

20121011111210 is a wasteful number, since it uses less digits than its factorization.

20121011111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756742.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20121011111210 its reverse (1211111012102), we get a palindrome (21332122123312).

The spelling of 20121011111210 in words is "twenty trillion, one hundred twenty-one billion, eleven million, one hundred eleven thousand, two hundred ten".