122111001001 has 4 divisors (see below), whose sum is σ = 133212001104. Its totient is φ = 111010000900.

The previous prime is 122111000993. The next prime is 122111001031. The reversal of 122111001001 is 100100111221.

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 122111001001 - 2³ = 122111000993 is a prime.

It is a super-2 number, since 2×122111001001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122111001031) 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, 5550500035 + ... + 5550500056.

It is an arithmetic number, because the mean of its divisors is an integer number (33303000276).

Almost surely, 2^122111001001 is an apocalyptic number.

122111001001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122111001001 is a deficient number, since it is larger than the sum of its proper divisors (11101000103).

122111001001 is a wasteful number, since it uses less digits than its factorization.

122111001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101000102.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 122111001001 its reverse (100100111221), we get a palindrome (222211112222).

The spelling of 122111001001 in words is "one hundred twenty-two billion, one hundred eleven million, one thousand, one".