20011012010111 has 4 divisors (see below), whose sum is σ = 20011145178000. Its totient is φ = 20010878842224.

The previous prime is 20011012010081. The next prime is 20011012010137. The reversal of 20011012010111 is 11101021011002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20011012010111 - 2²² = 20011007815807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011012010092 and 20011012010101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011012010141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66358286 + ... + 66659163.

It is an arithmetic number, because the mean of its divisors is an integer number (5002786294500).

Almost surely, 2^{20011012010111} is an apocalyptic number.

20011012010111 is a deficient number, since it is larger than the sum of its proper divisors (133167889).

20011012010111 is a wasteful number, since it uses less digits than its factorization.

20011012010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133167888.

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

Adding to 20011012010111 its reverse (11101021011002), we get a palindrome (31112033021113).

The spelling of 20011012010111 in words is "twenty trillion, eleven billion, twelve million, ten thousand, one hundred eleven".