21031033303311 has 8 divisors (see below), whose sum is σ = 28041406286640. Its totient is φ = 14020674594432.

The previous prime is 21031033303303. The next prime is 21031033303363. The reversal of 21031033303311 is 11330333013012.

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

It is not a de Polignac number, because 21031033303311 - 2³ = 21031033303303 is a prime.

It is a super-5 number, since 5×21031033303311⁵ (a number of 68 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031033303391) 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, 547351 + ... + 6508583.

It is an arithmetic number, because the mean of its divisors is an integer number (3505175785830).

Almost surely, 2^{21031033303311} is an apocalyptic number.

21031033303311 is a deficient number, since it is larger than the sum of its proper divisors (7010372983329).

21031033303311 is a wasteful number, since it uses less digits than its factorization.

21031033303311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137225.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 21031033303311 its reverse (11330333013012), we get a palindrome (32361366316323).

The spelling of 21031033303311 in words is "twenty-one trillion, thirty-one billion, thirty-three million, three hundred three thousand, three hundred eleven".