211122120001 has 4 divisors (see below), whose sum is σ = 227362283092. Its totient is φ = 194881956912.

The previous prime is 211122119993. The next prime is 211122120019. The reversal of 211122120001 is 100021221112.

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 63857290000 + 147264830001 = 252700^2 + 383751^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122120001 - 2³ = 211122119993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16240163077 = 211122120001 / (2 + 1 + 1 + 1 + 2 + 2 + 1 + 2 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122120071) 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, 8120081526 + ... + 8120081551.

It is an arithmetic number, because the mean of its divisors is an integer number (56840570773).

Almost surely, 2^211122120001 is an apocalyptic number.

It is an amenable number.

211122120001 is a deficient number, since it is larger than the sum of its proper divisors (16240163091).

211122120001 is a wasteful number, since it uses less digits than its factorization.

211122120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16240163090.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211122120001 its reverse (100021221112), we get a palindrome (311143341113).

The spelling of 211122120001 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twenty thousand, one".