21011201303231 has 8 divisors (see below), whose sum is σ = 21693994604544. Its totient is φ = 20328721290360.

The previous prime is 21011201303207. The next prime is 21011201303273. The reversal of 21011201303231 is 13230310211012.

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 a de Polignac number, because none of the positive numbers 2^k-21011201303231 is a prime.

It is a super-2 number, since 2×21011201303231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011201303291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78185795 + ... + 78454068.

It is an arithmetic number, because the mean of its divisors is an integer number (2711749325568).

Almost surely, 2^{21011201303231} is an apocalyptic number.

21011201303231 is a deficient number, since it is larger than the sum of its proper divisors (682793301313).

21011201303231 is a wasteful number, since it uses less digits than its factorization.

21011201303231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156644221.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21011201303231 its reverse (13230310211012), we get a palindrome (34241511514243).

The spelling of 21011201303231 in words is "twenty-one trillion, eleven billion, two hundred one million, three hundred three thousand, two hundred thirty-one".