20000221121121 has 8 divisors (see below), whose sum is σ = 26916185434464. Its totient is φ = 13208868777600.

The previous prime is 20000221121113. The next prime is 20000221121123. The reversal of 20000221121121 is 12112112200002.

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

It is not a de Polignac number, because 20000221121121 - 2³ = 20000221121113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20000221121121.

It is not an unprimeable number, because it can be changed into a prime (20000221121123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31152992080 + ... + 31152992721.

It is an arithmetic number, because the mean of its divisors is an integer number (3364523179308).

Almost surely, 2^{20000221121121} is an apocalyptic number.

It is an amenable number.

20000221121121 is a deficient number, since it is larger than the sum of its proper divisors (6915964313343).

20000221121121 is a wasteful number, since it uses less digits than its factorization.

20000221121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62305984911.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20000221121121 its reverse (12112112200002), we get a palindrome (32112333321123).

The spelling of 20000221121121 in words is "twenty trillion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".