212120306461 has 8 divisors (see below), whose sum is σ = 250243311104. Its totient is φ = 175952327760.

The previous prime is 212120306459. The next prime is 212120306473. The reversal of 212120306461 is 164603021212.

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 212120306461 - 2¹ = 212120306459 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 (212120306401) 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, 488756250 + ... + 488756683.

It is an arithmetic number, because the mean of its divisors is an integer number (31280413888).

Almost surely, 2^212120306461 is an apocalyptic number.

It is an amenable number.

212120306461 is a deficient number, since it is larger than the sum of its proper divisors (38123004643).

212120306461 is an equidigital number, since it uses as much as digits as its factorization.

212120306461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977512971.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 212120306461 its reverse (164603021212), we get a palindrome (376723327673).

The spelling of 212120306461 in words is "two hundred twelve billion, one hundred twenty million, three hundred six thousand, four hundred sixty-one".