20122112111001 has 4 divisors (see below), whose sum is σ = 26829482814672. Its totient is φ = 13414741407332.

The previous prime is 20122112110999. The next prime is 20122112111039. The reversal of 20122112111001 is 10011121122102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20122112111001 - 2¹ = 20122112110999 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20122112111501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353685351831 + ... + 3353685351836.

It is an arithmetic number, because the mean of its divisors is an integer number (6707370703668).

Almost surely, 2^{20122112111001} is an apocalyptic number.

It is an amenable number.

20122112111001 is a deficient number, since it is larger than the sum of its proper divisors (6707370703671).

20122112111001 is an equidigital number, since it uses as much as digits as its factorization.

20122112111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707370703670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20122112111001 its reverse (10011121122102), we get a palindrome (30133233233103).

The spelling of 20122112111001 in words is "twenty trillion, one hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, one".