212571548021 has 4 divisors (see below), whose sum is σ = 242938912032. Its totient is φ = 182204184012.

The previous prime is 212571547999. The next prime is 212571548029. The reversal of 212571548021 is 120845175212.

212571548021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212571548021 - 2¹⁴ = 212571531637 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 (212571548029) 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 3 ways as a sum of consecutive naturals, for example, 15183681995 + ... + 15183682008.

It is an arithmetic number, because the mean of its divisors is an integer number (60734728008).

Almost surely, 2^212571548021 is an apocalyptic number.

It is an amenable number.

212571548021 is a deficient number, since it is larger than the sum of its proper divisors (30367364011).

212571548021 is an equidigital number, since it uses as much as digits as its factorization.

212571548021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30367364010.

The product of its (nonzero) digits is 44800, while the sum is 38.

The spelling of 212571548021 in words is "two hundred twelve billion, five hundred seventy-one million, five hundred forty-eight thousand, twenty-one".