20121111110 has 8 divisors (see below), whose sum is σ = 36218000016. Its totient is φ = 8048444440.

The previous prime is 20121111071. The next prime is 20121111119. The reversal of 20121111110 is 1111112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20121111110² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121111091 and 20121111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111119) 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 3 ways as a sum of consecutive naturals, for example, 1006055546 + ... + 1006055565.

It is an arithmetic number, because the mean of its divisors is an integer number (4527250002).

Almost surely, 2^20121111110 is an apocalyptic number.

20121111110 is a deficient number, since it is larger than the sum of its proper divisors (16096888906).

20121111110 is a wasteful number, since it uses less digits than its factorization.

20121111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012111118.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20121111110 its reverse (1111112102), we get a palindrome (21232223212).

The spelling of 20121111110 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".