20112111121210 has 16 divisors (see below), whose sum is σ = 36201890601000. Its totient is φ = 8044824318976.

The previous prime is 20112111121163. The next prime is 20112111121211. The reversal of 20112111121210 is 1212111121102.

It can be written as a sum of positive squares in 4 ways, for example, as 4822235929681 + 15289875191529 = 2195959^2 + 3910227^2 .

It is not an unprimeable number, because it can be changed into a prime (20112111121211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079966 + ... + 6674614.

Almost surely, 2^{20112111121210} is an apocalyptic number.

20112111121210 is a deficient number, since it is larger than the sum of its proper divisors (16089779479790).

20112111121210 is a wasteful number, since it uses less digits than its factorization.

20112111121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032385.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 20112111121210 its reverse (1212111121102), we get a palindrome (21324222242312).

The spelling of 20112111121210 in words is "twenty trillion, one hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred ten".