21201131113301 has 4 divisors (see below), whose sum is σ = 21718231872204. Its totient is φ = 20684030354400.

The previous prime is 21201131113271. The next prime is 21201131113381. The reversal of 21201131113301 is 10331113110212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12100205746225 + 9100925367076 = 3478535^2 + 3016774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21201131113301 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201131113381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258550379390 + ... + 258550379471.

It is an arithmetic number, because the mean of its divisors is an integer number (5429557968051).

Almost surely, 2^{21201131113301} is an apocalyptic number.

It is an amenable number.

21201131113301 is a deficient number, since it is larger than the sum of its proper divisors (517100758903).

21201131113301 is an equidigital number, since it uses as much as digits as its factorization.

21201131113301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517100758902.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 21201131113301 its reverse (10331113110212), we get a palindrome (31532244223513).

The spelling of 21201131113301 in words is "twenty-one trillion, two hundred one billion, one hundred thirty-one million, one hundred thirteen thousand, three hundred one".