211223031001 has 4 divisors (see below), whose sum is σ = 211365078912. Its totient is φ = 211080983092.

The previous prime is 211223030983. The next prime is 211223031049. The reversal of 211223031001 is 100130322112.

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 211223031001 - 2¹⁷ = 211222899929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211223031601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71021725 + ... + 71024698.

It is an arithmetic number, because the mean of its divisors is an integer number (52841269728).

Almost surely, 2^211223031001 is an apocalyptic number.

It is an amenable number.

211223031001 is a deficient number, since it is larger than the sum of its proper divisors (142047911).

211223031001 is a wasteful number, since it uses less digits than its factorization.

211223031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142047910.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 211223031001 its reverse (100130322112), we get a palindrome (311353353113).

The spelling of 211223031001 in words is "two hundred eleven billion, two hundred twenty-three million, thirty-one thousand, one".