21000022203001 has 2 divisors, whose sum is σ = 21000022203002. Its totient is φ = 21000022203000.

The previous prime is 21000022202993. The next prime is 21000022203071. The reversal of 21000022203001 is 10030222000012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19065972931600 + 1934049271401 = 4366460^2 + 1390701^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000022203001 - 2³ = 21000022202993 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000022203071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500011101500 + 10500011101501.

It is an arithmetic number, because the mean of its divisors is an integer number (10500011101501).

Almost surely, 2^{21000022203001} is an apocalyptic number.

It is an amenable number.

21000022203001 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000022203001 is an equidigital number, since it uses as much as digits as its factorization.

21000022203001 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 13.

Adding to 21000022203001 its reverse (10030222000012), we get a palindrome (31030244203013).

The spelling of 21000022203001 in words is "twenty-one trillion, twenty-two million, two hundred three thousand, one".