11112122121001 has 4 divisors (see below), whose sum is σ = 12122315041104. Its totient is φ = 10101929200900.

The previous prime is 11112122120941. The next prime is 11112122121013. The reversal of 11112122121001 is 10012122121111.

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 11112122121001 - 2¹¹ = 11112122118953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112122121301) 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, 505096460035 + ... + 505096460056.

It is an arithmetic number, because the mean of its divisors is an integer number (3030578760276).

Almost surely, 2^{11112122121001} is an apocalyptic number.

11112122121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11112122121001 is a deficient number, since it is larger than the sum of its proper divisors (1010192920103).

11112122121001 is a wasteful number, since it uses less digits than its factorization.

11112122121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010192920102.

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

Adding to 11112122121001 its reverse (10012122121111), we get a palindrome (21124244242112).

The spelling of 11112122121001 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one".