21031001034 has 32 divisors (see below), whose sum is σ = 42174592704. Its totient is φ = 6991595520.

The previous prime is 21031000973. The next prime is 21031001039. The reversal of 21031001034 is 43010013012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21031001039) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4201177 + ... + 4206179.

It is an arithmetic number, because the mean of its divisors is an integer number (1317956022).

Almost surely, 2^21031001034 is an apocalyptic number.

21031001034 is an abundant number, since it is smaller than the sum of its proper divisors (21143591670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031001034 is a wasteful number, since it uses less digits than its factorization.

21031001034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6742.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21031001034 its reverse (43010013012), we get a palindrome (64041014046).

The spelling of 21031001034 in words is "twenty-one billion, thirty-one million, one thousand, thirty-four".