211142333021 has 8 divisors (see below), whose sum is σ = 211912689240. Its totient is φ = 210372315712.

The previous prime is 211142332997. The next prime is 211142333053. The reversal of 211142333021 is 120333241112.

It can be written as a sum of positive squares in 4 ways, for example, as 82343172025 + 128799160996 = 286955^2 + 358886^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211142333021 - 2¹⁰ = 211142331997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211142333321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1198895 + ... + 1363683.

It is an arithmetic number, because the mean of its divisors is an integer number (26489086155).

Almost surely, 2^211142333021 is an apocalyptic number.

It is an amenable number.

211142333021 is a deficient number, since it is larger than the sum of its proper divisors (770356219).

211142333021 is a wasteful number, since it uses less digits than its factorization.

211142333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169455.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 211142333021 its reverse (120333241112), we get a palindrome (331475574133).

The spelling of 211142333021 in words is "two hundred eleven billion, one hundred forty-two million, three hundred thirty-three thousand, twenty-one".