211121233101001 has 4 divisors (see below), whose sum is σ = 211122460372500. Its totient is φ = 211120005829504.

The previous prime is 211121233100993. The next prime is 211121233101013. The reversal of 211121233101001 is 100101332121112.

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 197309752796601 + 13811480304400 = 14046699^2 + 3716380^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121233101001 - 2³ = 211121233100993 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 211121233101001.

It is not an unprimeable number, because it can be changed into a prime (211121233101041) 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, 613377676 + ... + 613721773.

It is an arithmetic number, because the mean of its divisors is an integer number (52780615093125).

Almost surely, 2^{211121233101001} is an apocalyptic number.

It is an amenable number.

211121233101001 is a deficient number, since it is larger than the sum of its proper divisors (1227271499).

211121233101001 is a wasteful number, since it uses less digits than its factorization.

211121233101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227271498.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 211121233101001 its reverse (100101332121112), we get a palindrome (311222565222113).

The spelling of 211121233101001 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred thirty-three million, one hundred one thousand, one".