21003033501330 has 32 divisors (see below), whose sum is σ = 51769639335744. Its totient is φ = 5449435718976.

The previous prime is 21003033501277. The next prime is 21003033501343. The reversal of 21003033501330 is 3310533030012.

It is a super-2 number, since 2×21003033501330² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003033501330.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9460824792 + ... + 9460827011.

It is an arithmetic number, because the mean of its divisors is an integer number (1617801229242).

Almost surely, 2^{21003033501330} is an apocalyptic number.

21003033501330 is an abundant number, since it is smaller than the sum of its proper divisors (30766605834414).

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

21003033501330 is a wasteful number, since it uses less digits than its factorization.

21003033501330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18921651850.

The product of its (nonzero) digits is 2430, while the sum is 24.

Adding to 21003033501330 its reverse (3310533030012), we get a palindrome (24313566531342).

The spelling of 21003033501330 in words is "twenty-one trillion, three billion, thirty-three million, five hundred one thousand, three hundred thirty".