20122112001121 has 4 divisors (see below), whose sum is σ = 21669966770452. Its totient is φ = 18574257231792.

The previous prime is 20122112001097. The next prime is 20122112001139. The reversal of 20122112001121 is 12110021122102.

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 3325754032225 + 16796357968896 = 1823665^2 + 4098336^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122112001121 - 2⁹ = 20122112000609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20122112001095 and 20122112001104.

It is not an unprimeable number, because it can be changed into a prime (20122112001521) 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, 773927384646 + ... + 773927384671.

It is an arithmetic number, because the mean of its divisors is an integer number (5417491692613).

Almost surely, 2^{20122112001121} is an apocalyptic number.

It is an amenable number.

20122112001121 is a deficient number, since it is larger than the sum of its proper divisors (1547854769331).

20122112001121 is a wasteful number, since it uses less digits than its factorization.

20122112001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547854769330.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20122112001121 its reverse (12110021122102), we get a palindrome (32232133123223).

The spelling of 20122112001121 in words is "twenty trillion, one hundred twenty-two billion, one hundred twelve million, one thousand, one hundred twenty-one".