21130331235 has 32 divisors (see below), whose sum is σ = 37096170048. Its totient is φ = 10206343680.

The previous prime is 21130331207. The next prime is 21130331263. The reversal of 21130331235 is 53213303112.

It is an interprime number because it is at equal distance from previous prime (21130331207) and next prime (21130331263).

It is not a de Polignac number, because 21130331235 - 2⁸ = 21130330979 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1011936 + ... + 1032605.

It is an arithmetic number, because the mean of its divisors is an integer number (1159255314).

Almost surely, 2^21130331235 is an apocalyptic number.

21130331235 is a deficient number, since it is larger than the sum of its proper divisors (15965838813).

21130331235 is a wasteful number, since it uses less digits than its factorization.

21130331235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2044615.

The product of its (nonzero) digits is 1620, while the sum is 24.

Adding to 21130331235 its reverse (53213303112), we get a palindrome (74343634347).

The spelling of 21130331235 in words is "twenty-one billion, one hundred thirty million, three hundred thirty-one thousand, two hundred thirty-five".