201312021330 has 128 divisors (see below), whose sum is σ = 619597416960. Its totient is φ = 45558547200.

The previous prime is 201312021329. The next prime is 201312021343. The reversal of 201312021330 is 33120213102.

201312021330 is a `hidden beast` number, since 2 + 0 + 1 + 312 + 0 + 21 + 330 = 666.

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

It is a Curzon number.

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, 336409 + ... + 718188.

It is an arithmetic number, because the mean of its divisors is an integer number (4840604820).

Almost surely, 2^201312021330 is an apocalyptic number.

201312021330 is an abundant number, since it is smaller than the sum of its proper divisors (418285395630).

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

201312021330 is a wasteful number, since it uses less digits than its factorization.

201312021330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054721 (or 1054715 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 201312021330 its reverse (33120213102), we get a palindrome (234432234432).

The spelling of 201312021330 in words is "two hundred one billion, three hundred twelve million, twenty-one thousand, three hundred thirty".