20111014244021 has 2 divisors, whose sum is σ = 20111014244022. Its totient is φ = 20111014244020.

The previous prime is 20111014243937. The next prime is 20111014244023. The reversal of 20111014244021 is 12044241011102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10831740727921 + 9279273516100 = 3291161^2 + 3046190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20111014244021 is a prime.

Together with 20111014244023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111014244023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055507122010 + 10055507122011.

It is an arithmetic number, because the mean of its divisors is an integer number (10055507122011).

Almost surely, 2^{20111014244021} is an apocalyptic number.

It is an amenable number.

20111014244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111014244021 is an equidigital number, since it uses as much as digits as its factorization.

20111014244021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 20111014244021 its reverse (12044241011102), we get a palindrome (32155255255123).

The spelling of 20111014244021 in words is "twenty trillion, one hundred eleven billion, fourteen million, two hundred forty-four thousand, twenty-one".