211432216621 has 8 divisors (see below), whose sum is σ = 229919931000. Its totient is φ = 193616782848.

The previous prime is 211432216607. The next prime is 211432216711. The reversal of 211432216621 is 126612234112.

211432216621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 81461151396 + 129971065225 = 285414^2 + 360515^2 .

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 211432216621 - 2²³ = 211423828013 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 (211432216421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168069496 + ... + 168070753.

It is an arithmetic number, because the mean of its divisors is an integer number (28739991375).

Almost surely, 2^211432216621 is an apocalyptic number.

It is an amenable number.

211432216621 is a deficient number, since it is larger than the sum of its proper divisors (18487714379).

211432216621 is a wasteful number, since it uses less digits than its factorization.

211432216621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336140303.

The product of its digits is 6912, while the sum is 31.

The spelling of 211432216621 in words is "two hundred eleven billion, four hundred thirty-two million, two hundred sixteen thousand, six hundred twenty-one".