21020311303311 has 8 divisors (see below), whose sum is σ = 28027501628544. Its totient is φ = 14013330923480.

The previous prime is 21020311303309. The next prime is 21020311303427. The reversal of 21020311303311 is 11330311302012.

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 not a de Polignac number, because 21020311303311 - 2¹ = 21020311303309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020311803311) 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, 52252581 + ... + 52653326.

It is an arithmetic number, because the mean of its divisors is an integer number (3503437703568).

Almost surely, 2^{21020311303311} is an apocalyptic number.

21020311303311 is a deficient number, since it is larger than the sum of its proper divisors (7007190325233).

21020311303311 is a wasteful number, since it uses less digits than its factorization.

21020311303311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104972701.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21020311303311 its reverse (11330311302012), we get a palindrome (32350622605323).

The spelling of 21020311303311 in words is "twenty-one trillion, twenty billion, three hundred eleven million, three hundred three thousand, three hundred eleven".