212971356502 has 4 divisors (see below), whose sum is σ = 319457034756. Its totient is φ = 106485678250.

The previous prime is 212971356359. The next prime is 212971356503. The reversal of 212971356502 is 205653179212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212971356503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53242839124 + ... + 53242839127.

It is an arithmetic number, because the mean of its divisors is an integer number (79864258689).

Almost surely, 2^212971356502 is an apocalyptic number.

212971356502 is a deficient number, since it is larger than the sum of its proper divisors (106485678254).

212971356502 is a wasteful number, since it uses less digits than its factorization.

212971356502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106485678253.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 212971356502 in words is "two hundred twelve billion, nine hundred seventy-one million, three hundred fifty-six thousand, five hundred two".