21021010112201 has 16 divisors (see below), whose sum is σ = 23151953018880. Its totient is φ = 18927236900880.

The previous prime is 21021010112197. The next prime is 21021010112213. The reversal of 21021010112201 is 10221101012012.

It is not a de Polignac number, because 21021010112201 - 2² = 21021010112197 is a prime.

It is a super-2 number, since 2×21021010112201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021010112701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11997041 + ... + 13637118.

It is an arithmetic number, because the mean of its divisors is an integer number (1446997063680).

Almost surely, 2^{21021010112201} is an apocalyptic number.

It is an amenable number.

21021010112201 is a deficient number, since it is larger than the sum of its proper divisors (2130942906679).

21021010112201 is a wasteful number, since it uses less digits than its factorization.

21021010112201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25634884.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21021010112201 its reverse (10221101012012), we get a palindrome (31242111124213).

The spelling of 21021010112201 in words is "twenty-one trillion, twenty-one billion, ten million, one hundred twelve thousand, two hundred one".