211333144223021 has 4 divisors (see below), whose sum is σ = 211333608579132. Its totient is φ = 211332679866912.

The previous prime is 211333144222969. The next prime is 211333144223053. The reversal of 211333144223021 is 120322441333112.

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 157625865547396 + 53707278675625 = 12554914^2 + 7328525^2 .

It is a cyclic number.

It is not a de Polignac number, because 211333144223021 - 2¹⁴ = 211333144206637 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 (211333144220021) 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, 231494720 + ... + 232405833.

It is an arithmetic number, because the mean of its divisors is an integer number (52833402144783).

Almost surely, 2^{211333144223021} is an apocalyptic number.

It is an amenable number.

211333144223021 is a deficient number, since it is larger than the sum of its proper divisors (464356111).

211333144223021 is an equidigital number, since it uses as much as digits as its factorization.

211333144223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464356110.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 211333144223021 its reverse (120322441333112), we get a palindrome (331655585556133).

The spelling of 211333144223021 in words is "two hundred eleven trillion, three hundred thirty-three billion, one hundred forty-four million, two hundred twenty-three thousand, twenty-one".