212721266057 has 8 divisors (see below), whose sum is σ = 213814180800. Its totient is φ = 211628484144.

The previous prime is 212721266053. The next prime is 212721266159. The reversal of 212721266057 is 750662127212.

212721266057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212721266057 - 2² = 212721266053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212721266053) 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, 5706044 + ... + 5743202.

It is an arithmetic number, because the mean of its divisors is an integer number (26726772600).

Almost surely, 2^212721266057 is an apocalyptic number.

It is an amenable number.

212721266057 is a deficient number, since it is larger than the sum of its proper divisors (1092914743).

212721266057 is a wasteful number, since it uses less digits than its factorization.

212721266057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66415.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 212721266057 in words is "two hundred twelve billion, seven hundred twenty-one million, two hundred sixty-six thousand, fifty-seven".