210021121112401 has 2 divisors, whose sum is σ = 210021121112402. Its totient is φ = 210021121112400.

The previous prime is 210021121112273. The next prime is 210021121112479. The reversal of 210021121112401 is 104211121120012.

210021121112401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155672908841025 + 54348212271376 = 12476895^2 + 7372124^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021121112401 - 2⁷ = 210021121112273 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021121122401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010560556200 + 105010560556201.

It is an arithmetic number, because the mean of its divisors is an integer number (105010560556201).

Almost surely, 2^{210021121112401} is an apocalyptic number.

It is an amenable number.

210021121112401 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021121112401 is an equidigital number, since it uses as much as digits as its factorization.

210021121112401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210021121112401 its reverse (104211121120012), we get a palindrome (314232242232413).

The spelling of 210021121112401 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, four hundred one".