21223031020311 has 8 divisors (see below), whose sum is σ = 29210193232384. Its totient is φ = 13692278077560.

The previous prime is 21223031020181. The next prime is 21223031020333. The reversal of 21223031020311 is 11302013032212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21223031020311 - 2¹³ = 21223031012119 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 (21223031022311) 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, 114102317221 + ... + 114102317406.

It is an arithmetic number, because the mean of its divisors is an integer number (3651274154048).

Almost surely, 2^{21223031020311} is an apocalyptic number.

21223031020311 is a deficient number, since it is larger than the sum of its proper divisors (7987162212073).

21223031020311 is a wasteful number, since it uses less digits than its factorization.

21223031020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228204634661.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21223031020311 its reverse (11302013032212), we get a palindrome (32525044052523).

The spelling of 21223031020311 in words is "twenty-one trillion, two hundred twenty-three billion, thirty-one million, twenty thousand, three hundred eleven".