21000023022101 has 2 divisors, whose sum is σ = 21000023022102. Its totient is φ = 21000023022100.

The previous prime is 21000023022067. The next prime is 21000023022127. The reversal of 21000023022101 is 10122032000012.

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., 11232210399601 + 9767812622500 = 3351449^2 + 3125350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000023022101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000023022151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011511050 + 10500011511051.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011511051).

Almost surely, 2^{21000023022101} is an apocalyptic number.

It is an amenable number.

21000023022101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000023022101 is an equidigital number, since it uses as much as digits as its factorization.

21000023022101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21000023022101 its reverse (10122032000012), we get a palindrome (31122055022113).

The spelling of 21000023022101 in words is "twenty-one trillion, twenty-three million, twenty-two thousand, one hundred one".