21010002222001 has 8 divisors (see below), whose sum is σ = 22663431628544. Its totient is φ = 19361897871120.

The previous prime is 21010002221993. The next prime is 21010002222037. The reversal of 21010002222001 is 10022220001012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010002222001 - 2³ = 21010002221993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010002222701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331255715 + ... + 1331271496.

It is an arithmetic number, because the mean of its divisors is an integer number (2832928953568).

Almost surely, 2^{21010002222001} is an apocalyptic number.

It is an amenable number.

21010002222001 is a deficient number, since it is larger than the sum of its proper divisors (1653429406543).

21010002222001 is a wasteful number, since it uses less digits than its factorization.

21010002222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2662527831.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21010002222001 its reverse (10022220001012), we get a palindrome (31032222223013).

The spelling of 21010002222001 in words is "twenty-one trillion, ten billion, two million, two hundred twenty-two thousand, one".