20011121011101 has 48 divisors (see below), whose sum is σ = 29621494272384. Its totient is φ = 12006442800000.

The previous prime is 20011121011087. The next prime is 20011121011139. The reversal of 20011121011101 is 10111012111002.

It is not a de Polignac number, because 20011121011101 - 2¹⁵ = 20011120978333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011121011201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362972800 + ... + 363027926.

It is an arithmetic number, because the mean of its divisors is an integer number (617114464008).

Almost surely, 2^{20011121011101} is an apocalyptic number.

It is an amenable number.

20011121011101 is a deficient number, since it is larger than the sum of its proper divisors (9610373261283).

20011121011101 is a wasteful number, since it uses less digits than its factorization.

20011121011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65154 (or 65143 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20011121011101 its reverse (10111012111002), we get a palindrome (30122133122103).

It can be divided in two parts, 200111 and 21011101, that added together give a palindrome (21211212).

The spelling of 20011121011101 in words is "twenty trillion, eleven billion, one hundred twenty-one million, eleven thousand, one hundred one".