21203031132311 has 8 divisors (see below), whose sum is σ = 24380698376064. Its totient is φ = 18062529587640.

The previous prime is 21203031132289. The next prime is 21203031132347. The reversal of 21203031132311 is 11323113030212.

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 21203031132311 - 2¹⁴ = 21203031115927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203031152311) 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, 9291423545 + ... + 9291425826.

It is an arithmetic number, because the mean of its divisors is an integer number (3047587297008).

Almost surely, 2^{21203031132311} is an apocalyptic number.

21203031132311 is a deficient number, since it is larger than the sum of its proper divisors (3177667243753).

21203031132311 is a wasteful number, since it uses less digits than its factorization.

21203031132311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18582849541.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21203031132311 its reverse (11323113030212), we get a palindrome (32526144162523).

The spelling of 21203031132311 in words is "twenty-one trillion, two hundred three billion, thirty-one million, one hundred thirty-two thousand, three hundred eleven".