212021121047 has 2 divisors, whose sum is σ = 212021121048. Its totient is φ = 212021121046.

The previous prime is 212021121001. The next prime is 212021121071. The reversal of 212021121047 is 740121120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212021121047 - 2¹⁶ = 212021055511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212021121097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010560523 + 106010560524.

It is an arithmetic number, because the mean of its divisors is an integer number (106010560524).

Almost surely, 2^212021121047 is an apocalyptic number.

212021121047 is a deficient number, since it is larger than the sum of its proper divisors (1).

212021121047 is an equidigital number, since it uses as much as digits as its factorization.

212021121047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 212021121047 its reverse (740121120212), we get a palindrome (952142241259).

The spelling of 212021121047 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, forty-seven".