20013213232121 has 8 divisors (see below), whose sum is σ = 20153866920000. Its totient is φ = 19872991661040.

The previous prime is 20013213232097. The next prime is 20013213232157. The reversal of 20013213232121 is 12123231231002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013213232121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013213232421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107936246 + ... + 108121503.

It is an arithmetic number, because the mean of its divisors is an integer number (2519233365000).

Almost surely, 2^{20013213232121} is an apocalyptic number.

It is an amenable number.

20013213232121 is a deficient number, since it is larger than the sum of its proper divisors (140653687879).

20013213232121 is a wasteful number, since it uses less digits than its factorization.

20013213232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216058399.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20013213232121 its reverse (12123231231002), we get a palindrome (32136444463123).

The spelling of 20013213232121 in words is "twenty trillion, thirteen billion, two hundred thirteen million, two hundred thirty-two thousand, one hundred twenty-one".