21035411331 has 16 divisors (see below), whose sum is σ = 30694730880. Its totient is φ = 12707997120.

The previous prime is 21035411311. The next prime is 21035411357. The reversal of 21035411331 is 13311453012.

It is not a de Polignac number, because 21035411331 - 2¹⁵ = 21035378563 is a prime.

It is a super-2 number, since 2×21035411331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21035411311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1007941 + ... + 1028598.

It is an arithmetic number, because the mean of its divisors is an integer number (1918420680).

Almost surely, 2^21035411331 is an apocalyptic number.

21035411331 is a deficient number, since it is larger than the sum of its proper divisors (9659319549).

21035411331 is a wasteful number, since it uses less digits than its factorization.

21035411331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036866.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 21035411331 its reverse (13311453012), we get a palindrome (34346864343).

The spelling of 21035411331 in words is "twenty-one billion, thirty-five million, four hundred eleven thousand, three hundred thirty-one".