21021201210330 has 128 divisors (see below), whose sum is σ = 59336530560000. Its totient is φ = 5280950758464.

The previous prime is 21021201210323. The next prime is 21021201210377. The reversal of 21021201210330 is 3301210212012.

21021201210330 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 120 + 1 + 210 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10527820 + ... + 12364359.

It is an arithmetic number, because the mean of its divisors is an integer number (463566645000).

Almost surely, 2^{21021201210330} is an apocalyptic number.

21021201210330 is an abundant number, since it is smaller than the sum of its proper divisors (38315329349670).

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

21021201210330 is a wasteful number, since it uses less digits than its factorization.

21021201210330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22892393 (or 22892387 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21021201210330 its reverse (3301210212012), we get a palindrome (24322411422342).

The spelling of 21021201210330 in words is "twenty-one trillion, twenty-one billion, two hundred one million, two hundred ten thousand, three hundred thirty".