20001022110961 has 2 divisors, whose sum is σ = 20001022110962. Its totient is φ = 20001022110960.

The previous prime is 20001022110911. The next prime is 20001022111003. The reversal of 20001022110961 is 16901122010002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19858440350961 + 142581760000 = 4456281^2 + 377600^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001022110961 - 2⁴¹ = 17801998855409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001022110911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000511055480 + 10000511055481.

It is an arithmetic number, because the mean of its divisors is an integer number (10000511055481).

Almost surely, 2^{20001022110961} is an apocalyptic number.

It is an amenable number.

20001022110961 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001022110961 is an equidigital number, since it uses as much as digits as its factorization.

20001022110961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 20001022110961 its reverse (16901122010002), we get a palindrome (36902144120963).

The spelling of 20001022110961 in words is "twenty trillion, one billion, twenty-two million, one hundred ten thousand, nine hundred sixty-one".