22201001210021 has 2 divisors, whose sum is σ = 22201001210022. Its totient is φ = 22201001210020.

The previous prime is 22201001209997. The next prime is 22201001210099. The reversal of 22201001210021 is 12001210010222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20057983360996 + 2143017849025 = 4478614^2 + 1463905^2 .

It is a cyclic number.

It is not a de Polignac number, because 22201001210021 - 2⁴² = 17802954698917 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22201001209978 and 22201001210005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201001212021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100500605010 + 11100500605011.

It is an arithmetic number, because the mean of its divisors is an integer number (11100500605011).

Almost surely, 2^{22201001210021} is an apocalyptic number.

It is an amenable number.

22201001210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201001210021 is an equidigital number, since it uses as much as digits as its factorization.

22201001210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22201001210021 its reverse (12001210010222), we get a palindrome (34202211220243).

The spelling of 22201001210021 in words is "twenty-two trillion, two hundred one billion, one million, two hundred ten thousand, twenty-one".