21024412404601 has 2 divisors, whose sum is σ = 21024412404602. Its totient is φ = 21024412404600.

The previous prime is 21024412404421. The next prime is 21024412404617. The reversal of 21024412404601 is 10640421442012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17348066340201 + 3676346064400 = 4165101^2 + 1917380^2 .

It is a cyclic number.

It is not a de Polignac number, because 21024412404601 - 2³¹ = 21022264920953 is a prime.

It is not a weakly prime, because it can be changed into another prime (21024412404631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10512206202300 + 10512206202301.

It is an arithmetic number, because the mean of its divisors is an integer number (10512206202301).

Almost surely, 2^{21024412404601} is an apocalyptic number.

It is an amenable number.

21024412404601 is a deficient number, since it is larger than the sum of its proper divisors (1).

21024412404601 is an equidigital number, since it uses as much as digits as its factorization.

21024412404601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 21024412404601 its reverse (10640421442012), we get a palindrome (31664833846613).

The spelling of 21024412404601 in words is "twenty-one trillion, twenty-four billion, four hundred twelve million, four hundred four thousand, six hundred one".