212000454661 has 8 divisors (see below), whose sum is σ = 214831873280. Its totient is φ = 209172732912.

The previous prime is 212000454647. The next prime is 212000454683. The reversal of 212000454661 is 166454000212.

It is a happy number.

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 212000454661 - 2²¹ = 211998357509 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 (212000451661) 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, 808665 + ... + 1038238.

It is an arithmetic number, because the mean of its divisors is an integer number (26853984160).

Almost surely, 2^212000454661 is an apocalyptic number.

It is an amenable number.

212000454661 is a deficient number, since it is larger than the sum of its proper divisors (2831418619).

212000454661 is a wasteful number, since it uses less digits than its factorization.

212000454661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848435.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 212000454661 its reverse (166454000212), we get a palindrome (378454454873).

The spelling of 212000454661 in words is "two hundred twelve billion, four hundred fifty-four thousand, six hundred sixty-one".