212022729 has 12 divisors (see below), whose sum is σ = 322374000. Its totient is φ = 133908984.

The previous prime is 212022709. The next prime is 212022787. The reversal of 212022729 is 927220212.

212022729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212022729 - 2¹² = 212018633 is a prime.

It is a super-3 number, since 3×212022729³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212022709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619779 + ... + 620120.

It is an arithmetic number, because the mean of its divisors is an integer number (26864500).

Almost surely, 2^212022729 is an apocalyptic number.

It is an amenable number.

212022729 is a deficient number, since it is larger than the sum of its proper divisors (110351271).

212022729 is a wasteful number, since it uses less digits than its factorization.

212022729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239924 (or 1239921 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 212022729 is about 14561.0002747064. Note that the first 3 decimals coincide. The cubic root of 212022729 is about 596.2945042793.

The spelling of 212022729 in words is "two hundred twelve million, twenty-two thousand, seven hundred twenty-nine".