20121111010010 has 16 divisors (see below), whose sum is σ = 36461073645000. Its totient is φ = 7994427998016.

The previous prime is 20121111009977. The next prime is 20121111010061. The reversal of 20121111010010 is 1001011112102.

It can be written as a sum of positive squares in 4 ways, for example, as 17744676028249 + 2376434981761 = 4212443^2 + 1541569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20121111009973 and 20121111010000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6752049185 + ... + 6752052164.

Almost surely, 2^{20121111010010} is an apocalyptic number.

20121111010010 is a deficient number, since it is larger than the sum of its proper divisors (16339962634990).

20121111010010 is a wasteful number, since it uses less digits than its factorization.

20121111010010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13504101505.

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

Adding to 20121111010010 its reverse (1001011112102), we get a palindrome (21122122122112).

The spelling of 20121111010010 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, ten thousand, ten".