20012121330 has 32 divisors (see below), whose sum is σ = 48143204928. Its totient is φ = 5323886400.

The previous prime is 20012121329. The next prime is 20012121373. The reversal of 20012121330 is 3312121002.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779616 + ... + 804875.

It is an arithmetic number, because the mean of its divisors is an integer number (1504475154).

Almost surely, 2^20012121330 is an apocalyptic number.

20012121330 is an abundant number, since it is smaller than the sum of its proper divisors (28131083598).

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

20012121330 is a wasteful number, since it uses less digits than its factorization.

20012121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584922.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20012121330 its reverse (3312121002), we get a palindrome (23324242332).

The spelling of 20012121330 in words is "twenty billion, twelve million, one hundred twenty-one thousand, three hundred thirty".