21030012034 has 8 divisors (see below), whose sum is σ = 31635926928. Its totient is φ = 10484703060.

The previous prime is 21030012023. The next prime is 21030012103. The reversal of 21030012034 is 43021003012.

It is a happy number.

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

It is a super-2 number, since 2×21030012034² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21030011999 and 21030012017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15150612 + ... + 15151999.

It is an arithmetic number, because the mean of its divisors is an integer number (3954490866).

Almost surely, 2^21030012034 is an apocalyptic number.

21030012034 is a deficient number, since it is larger than the sum of its proper divisors (10605914894).

21030012034 is a wasteful number, since it uses less digits than its factorization.

21030012034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30302960.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21030012034 its reverse (43021003012), we get a palindrome (64051015046).

The spelling of 21030012034 in words is "twenty-one billion, thirty million, twelve thousand, thirty-four".