21021002000030 has 16 divisors (see below), whose sum is σ = 38860446941280. Its totient is φ = 8181146724192.

The previous prime is 21021001999951. The next prime is 21021002000093. The reversal of 21021002000030 is 3000020012012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021001999975 and 21021002000020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28406759090 + ... + 28406759829.

It is an arithmetic number, because the mean of its divisors is an integer number (2428777933830).

Almost surely, 2^{21021002000030} is an apocalyptic number.

21021002000030 is a deficient number, since it is larger than the sum of its proper divisors (17839444941250).

21021002000030 is a wasteful number, since it uses less digits than its factorization.

21021002000030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56813518963.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21021002000030 its reverse (3000020012012), we get a palindrome (24021022012042).

The spelling of 21021002000030 in words is "twenty-one trillion, twenty-one billion, two million, thirty", and thus it is an aban number and an uban number.