1021212047 has 2 divisors, whose sum is σ = 1021212048. Its totient is φ = 1021212046.

The previous prime is 1021212043. The next prime is 1021212079. The reversal of 1021212047 is 7402121201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021212047 - 2² = 1021212043 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021212043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510606023 + 510606024.

It is an arithmetic number, because the mean of its divisors is an integer number (510606024).

Almost surely, 2^1021212047 is an apocalyptic number.

1021212047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021212047 is an equidigital number, since it uses as much as digits as its factorization.

1021212047 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 1021212047 is about 31956.4085435144. The cubic root of 1021212047 is about 1007.0212687399.

Adding to 1021212047 its reverse (7402121201), we get a palindrome (8423333248).

The spelling of 1021212047 in words is "one billion, twenty-one million, two hundred twelve thousand, forty-seven".