21001030331330 has 32 divisors (see below), whose sum is σ = 43203108340224. Its totient is φ = 7200188456256.

The previous prime is 21001030331293. The next prime is 21001030331339. The reversal of 21001030331330 is 3313303010012.

It is not an unprimeable number, because it can be changed into a prime (21001030331339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333242 + ... + 6489461.

It is an arithmetic number, because the mean of its divisors is an integer number (1350097135632).

Almost surely, 2^{21001030331330} is an apocalyptic number.

21001030331330 is an abundant number, since it is smaller than the sum of its proper divisors (22202078008894).

21001030331330 is a wasteful number, since it uses less digits than its factorization.

21001030331330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866690.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21001030331330 its reverse (3313303010012), we get a palindrome (24314333341342).

The spelling of 21001030331330 in words is "twenty-one trillion, one billion, thirty million, three hundred thirty-one thousand, three hundred thirty".