212190556451 has 2 divisors, whose sum is σ = 212190556452. Its totient is φ = 212190556450.

The previous prime is 212190556427. The next prime is 212190556483. The reversal of 212190556451 is 154655091212.

It is a happy number.

212190556451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212190556451 - 2²² = 212186362147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212190556399 and 212190556408.

It is not a weakly prime, because it can be changed into another prime (212190556351) 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 as a sum of consecutive naturals, namely, 106095278225 + 106095278226.

It is an arithmetic number, because the mean of its divisors is an integer number (106095278226).

Almost surely, 2^212190556451 is an apocalyptic number.

212190556451 is a deficient number, since it is larger than the sum of its proper divisors (1).

212190556451 is an equidigital number, since it uses as much as digits as its factorization.

212190556451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 212190556451 in words is "two hundred twelve billion, one hundred ninety million, five hundred fifty-six thousand, four hundred fifty-one".