21030012033 has 8 divisors (see below), whose sum is σ = 28254062496. Its totient is φ = 13912984800.

The previous prime is 21030012023. The next prime is 21030012103. The reversal of 21030012033 is 33021003012.

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

It is not a de Polignac number, because 21030012033 - 2⁵ = 21030012001 is a prime.

It is a super-2 number, since 2×21030012033² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21030012023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26755348 + ... + 26756133.

It is an arithmetic number, because the mean of its divisors is an integer number (3531757812).

Almost surely, 2^21030012033 is an apocalyptic number.

It is an amenable number.

21030012033 is a deficient number, since it is larger than the sum of its proper divisors (7224050463).

21030012033 is a wasteful number, since it uses less digits than its factorization.

21030012033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53511615.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21030012033 its reverse (33021003012), we get a palindrome (54051015045).

The spelling of 21030012033 in words is "twenty-one billion, thirty million, twelve thousand, thirty-three".