20121320410 has 8 divisors (see below), whose sum is σ = 36218376756. Its totient is φ = 8048528160.

The previous prime is 20121320407. The next prime is 20121320413. The reversal of 20121320410 is 1402312102.

It is an interprime number because it is at equal distance from previous prime (20121320407) and next prime (20121320413).

It can be written as a sum of positive squares in 2 ways, for example, as 19213563769 + 907756641 = 138613^2 + 30129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20121320413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006066011 + ... + 1006066030.

Almost surely, 2^20121320410 is an apocalyptic number.

20121320410 is a deficient number, since it is larger than the sum of its proper divisors (16097056346).

20121320410 is a wasteful number, since it uses less digits than its factorization.

20121320410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012132048.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121320410 its reverse (1402312102), we get a palindrome (21523632512).

The spelling of 20121320410 in words is "twenty billion, one hundred twenty-one million, three hundred twenty thousand, four hundred ten".