20120010121121 has 4 divisors (see below), whose sum is σ = 20120074419732. Its totient is φ = 20119945822512.

The previous prime is 20120010121103. The next prime is 20120010121157. The reversal of 20120010121121 is 12112101002102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6736931713600 + 13383078407521 = 2595560^2 + 3658289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120010121121 is a prime.

It is a super-2 number, since 2×20120010121121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120010121096 and 20120010121105.

It is not an unprimeable number, because it can be changed into a prime (20120010121171) 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, 31677626 + ... + 32306531.

It is an arithmetic number, because the mean of its divisors is an integer number (5030018604933).

Almost surely, 2^{20120010121121} is an apocalyptic number.

It is an amenable number.

20120010121121 is a deficient number, since it is larger than the sum of its proper divisors (64298611).

20120010121121 is an equidigital number, since it uses as much as digits as its factorization.

20120010121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64298610.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120010121121 its reverse (12112101002102), we get a palindrome (32232111123223).

The spelling of 20120010121121 in words is "twenty trillion, one hundred twenty billion, ten million, one hundred twenty-one thousand, one hundred twenty-one".