21121030034 has 32 divisors (see below), whose sum is σ = 35523820080. Its totient is φ = 9354470400.

The previous prime is 21121030033. The next prime is 21121030043. The reversal of 21121030034 is 43003012112.

It can be written as a sum of positive squares in 8 ways, for example, as 274001809 + 20847028225 = 16553^2 + 144385^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21121029994 and 21121030021.

It is not an unprimeable number, because it can be changed into a prime (21121030031) 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, 97379 + ... + 227430.

Almost surely, 2^21121030034 is an apocalyptic number.

21121030034 is a deficient number, since it is larger than the sum of its proper divisors (14402790046).

21121030034 is a wasteful number, since it uses less digits than its factorization.

21121030034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324926.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21121030034 its reverse (43003012112), we get a palindrome (64124042146).

The spelling of 21121030034 in words is "twenty-one billion, one hundred twenty-one million, thirty thousand, thirty-four".