20121122002001 has 4 divisors (see below), whose sum is σ = 20171299364004. Its totient is φ = 20070944640000.

The previous prime is 20121122001913. The next prime is 20121122002013. The reversal of 20121122002001 is 10020022112102.

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 18096932894401 + 2024189107600 = 4254049^2 + 1422740^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121122002001 - 2⁴² = 15723075490897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121122002301) 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 3 ways as a sum of consecutive naturals, for example, 25088680400 + ... + 25088681201.

It is an arithmetic number, because the mean of its divisors is an integer number (5042824841001).

Almost surely, 2^{20121122002001} is an apocalyptic number.

It is an amenable number.

20121122002001 is a deficient number, since it is larger than the sum of its proper divisors (50177362003).

20121122002001 is an equidigital number, since it uses as much as digits as its factorization.

20121122002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50177362002.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121122002001 its reverse (10020022112102), we get a palindrome (30141144114103).

The spelling of 20121122002001 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-two million, two thousand, one".