20112002122121 has 16 divisors (see below), whose sum is σ = 24754561939968. Its totient is φ = 15911938814400.

The previous prime is 20112002122087. The next prime is 20112002122129. The reversal of 20112002122121 is 12122120021102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20112002122121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20112002122121.

It is not an unprimeable number, because it can be changed into a prime (20112002122129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4223585 + ... + 7619886.

It is an arithmetic number, because the mean of its divisors is an integer number (1547160121248).

Almost surely, 2^{20112002122121} is an apocalyptic number.

It is an amenable number.

20112002122121 is a deficient number, since it is larger than the sum of its proper divisors (4642559817847).

20112002122121 is a wasteful number, since it uses less digits than its factorization.

20112002122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862152.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20112002122121 its reverse (12122120021102), we get a palindrome (32234122143223).

The spelling of 20112002122121 in words is "twenty trillion, one hundred twelve billion, two million, one hundred twenty-two thousand, one hundred twenty-one".