212551421451 has 16 divisors (see below), whose sum is σ = 290485900320. Its totient is φ = 138163034880.

The previous prime is 212551421441. The next prime is 212551421497. The reversal of 212551421451 is 154124155212.

212551421451 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 212551421451 - 2⁷ = 212551421323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212551421441) 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 15 ways as a sum of consecutive naturals, for example, 302116 + ... + 718593.

It is an arithmetic number, because the mean of its divisors is an integer number (18155368770).

Almost surely, 2^212551421451 is an apocalyptic number.

212551421451 is a deficient number, since it is larger than the sum of its proper divisors (77934478869).

212551421451 is a wasteful number, since it uses less digits than its factorization.

212551421451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022446.

The product of its digits is 16000, while the sum is 33.

Adding to 212551421451 its reverse (154124155212), we get a palindrome (366675576663).

The spelling of 212551421451 in words is "two hundred twelve billion, five hundred fifty-one million, four hundred twenty-one thousand, four hundred fifty-one".