21103434021030 has 64 divisors (see below), whose sum is σ = 53974814496768. Its totient is φ = 5268375009920.

The previous prime is 21103434021029. The next prime is 21103434021091. The reversal of 21103434021030 is 3012043430112.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 325336581 + ... + 325401440.

It is an arithmetic number, because the mean of its divisors is an integer number (843356476512).

Almost surely, 2^{21103434021030} is an apocalyptic number.

21103434021030 is an abundant number, since it is smaller than the sum of its proper divisors (32871380475738).

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

21103434021030 is a wasteful number, since it uses less digits than its factorization.

21103434021030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650738101.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21103434021030 its reverse (3012043430112), we get a palindrome (24115477451142).

The spelling of 21103434021030 in words is "twenty-one trillion, one hundred three billion, four hundred thirty-four million, twenty-one thousand, thirty".