20121321010 has 32 divisors (see below), whose sum is σ = 41463031680. Its totient is φ = 6886972032.

The previous prime is 20121320983. The next prime is 20121321013. The reversal of 20121321010 is 1012312102.

It is not an unprimeable number, because it can be changed into a prime (20121321013) 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, 203755 + ... + 285934.

It is an arithmetic number, because the mean of its divisors is an integer number (1295719740).

Almost surely, 2^20121321010 is an apocalyptic number.

20121321010 is an abundant number, since it is smaller than the sum of its proper divisors (21341710670).

20121321010 is a wasteful number, since it uses less digits than its factorization.

20121321010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490290.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20121321010 its reverse (1012312102), we get a palindrome (21133633112).

The spelling of 20121321010 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-one thousand, ten".