21001201330 has 32 divisors (see below), whose sum is σ = 39756386304. Its totient is φ = 7971961536.

The previous prime is 21001201327. The next prime is 21001201349. The reversal of 21001201330 is 3310210012.

It is a self number, because there is not a number n which added to its sum of digits gives 21001201330.

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, 330277 + ... + 388696.

It is an arithmetic number, because the mean of its divisors is an integer number (1242387072).

Almost surely, 2^21001201330 is an apocalyptic number.

21001201330 is a deficient number, since it is larger than the sum of its proper divisors (18755184974).

21001201330 is a wasteful number, since it uses less digits than its factorization.

21001201330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719130.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21001201330 its reverse (3310210012), we get a palindrome (24311411342).

The spelling of 21001201330 in words is "twenty-one billion, one million, two hundred one thousand, three hundred thirty".