21012201201073 has 2 divisors, whose sum is σ = 21012201201074. Its totient is φ = 21012201201072.

The previous prime is 21012201201059. The next prime is 21012201201107. The reversal of 21012201201073 is 37010210221012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20777488082289 + 234713118784 = 4558233^2 + 484472^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012201201073 - 2⁹ = 21012201200561 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012201204073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506100600536 + 10506100600537.

It is an arithmetic number, because the mean of its divisors is an integer number (10506100600537).

Almost surely, 2^{21012201201073} is an apocalyptic number.

It is an amenable number.

21012201201073 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012201201073 is an equidigital number, since it uses as much as digits as its factorization.

21012201201073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 21012201201073 its reverse (37010210221012), we get a palindrome (58022411422085).

The spelling of 21012201201073 in words is "twenty-one trillion, twelve billion, two hundred one million, two hundred one thousand, seventy-three".