1100122001 has 4 divisors (see below), whose sum is σ = 1200133104. Its totient is φ = 1000110900.

The previous prime is 1100121973. The next prime is 1100122013. The reversal of 1100122001 is 1002210011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1002210011 = 11 ⋅91110001.

It is a cyclic number.

It is not a de Polignac number, because 1100122001 - 2⁶ = 1100121937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100122001.

It is not an unprimeable number, because it can be changed into a prime (1100122081) 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, 50005535 + ... + 50005556.

It is an arithmetic number, because the mean of its divisors is an integer number (300033276).

Almost surely, 2^1100122001 is an apocalyptic number.

1100122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100122001 is a deficient number, since it is larger than the sum of its proper divisors (100011103).

1100122001 is a wasteful number, since it uses less digits than its factorization.

1100122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100011102.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1100122001 is about 33168.0870868369. The cubic root of 1100122001 is about 1032.3182774414.

Adding to 1100122001 its reverse (1002210011), we get a palindrome (2102332012).

It can be divided in two parts, 11001 and 22001, that multiplied together give a triangular number (242033001 = T₂₂₀₀₁).

The spelling of 1100122001 in words is "one billion, one hundred million, one hundred twenty-two thousand, one".