21112201201 has 32 divisors (see below), whose sum is σ = 26570073600. Its totient is φ = 16669179072.

The previous prime is 21112201163. The next prime is 21112201261. The reversal of 21112201201 is 10210221112.

It is not a de Polignac number, because 21112201201 - 2¹⁷ = 21112070129 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (21112201261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2238171 + ... + 2247583.

It is an arithmetic number, because the mean of its divisors is an integer number (830314800).

Almost surely, 2^21112201201 is an apocalyptic number.

It is an amenable number.

21112201201 is a deficient number, since it is larger than the sum of its proper divisors (5457872399).

21112201201 is an equidigital number, since it uses as much as digits as its factorization.

21112201201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950 (or 9936 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21112201201 its reverse (10210221112), we get a palindrome (31322422313).

The spelling of 21112201201 in words is "twenty-one billion, one hundred twelve million, two hundred one thousand, two hundred one".