212000222154 has 24 divisors (see below), whose sum is σ = 493225007328. Its totient is φ = 60571491960.

The previous prime is 212000222153. The next prime is 212000222173. The reversal of 212000222154 is 451222000212.

212000222154 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212000222154.

It is not an unprimeable number, because it can be changed into a prime (212000222153) 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 11 ways as a sum of consecutive naturals, for example, 360544302 + ... + 360544889.

It is an arithmetic number, because the mean of its divisors is an integer number (20551041972).

Almost surely, 2^212000222154 is an apocalyptic number.

212000222154 is an abundant number, since it is smaller than the sum of its proper divisors (281224785174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212000222154 is a wasteful number, since it uses less digits than its factorization.

212000222154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721089210 (or 721089203 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 212000222154 its reverse (451222000212), we get a palindrome (663222222366).

The spelling of 212000222154 in words is "two hundred twelve billion, two hundred twenty-two thousand, one hundred fifty-four".