1212021047 has 2 divisors, whose sum is σ = 1212021048. Its totient is φ = 1212021046.

The previous prime is 1212020987. The next prime is 1212021067. The reversal of 1212021047 is 7401202121.

It is an a-pointer prime, because the next prime (1212021067) can be obtained adding 1212021047 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212021047 - 2¹⁴ = 1212004663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212021067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010523 + 606010524.

It is an arithmetic number, because the mean of its divisors is an integer number (606010524).

Almost surely, 2^1212021047 is an apocalyptic number.

1212021047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021047 is an equidigital number, since it uses as much as digits as its factorization.

1212021047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1212021047 is about 34814.0926493855. The cubic root of 1212021047 is about 1066.1951938614.

Adding to 1212021047 its reverse (7401202121), we get a palindrome (8613223168).

The spelling of 1212021047 in words is "one billion, two hundred twelve million, twenty-one thousand, forty-seven".