20011121211110 has 32 divisors (see below), whose sum is σ = 36038820651264. Its totient is φ = 8000271180000.

The previous prime is 20011121211097. The next prime is 20011121211113. The reversal of 20011121211110 is 1111212111002.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011121211113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167831615 + ... + 167950805.

It is an arithmetic number, because the mean of its divisors is an integer number (1126213145352).

Almost surely, 2^{20011121211110} is an apocalyptic number.

20011121211110 is a deficient number, since it is larger than the sum of its proper divisors (16027699440154).

20011121211110 is a wasteful number, since it uses less digits than its factorization.

20011121211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127820.

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

Adding to 20011121211110 its reverse (1111212111002), we get a palindrome (21122333322112).

The spelling of 20011121211110 in words is "twenty trillion, eleven billion, one hundred twenty-one million, two hundred eleven thousand, one hundred ten".