1211210120047 has 2 divisors, whose sum is σ = 1211210120048. Its totient is φ = 1211210120046.

The previous prime is 1211210119991. The next prime is 1211210120051. The reversal of 1211210120047 is 7400210121121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211210120047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211210126047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605605060023 + 605605060024.

It is an arithmetic number, because the mean of its divisors is an integer number (605605060024).

Almost surely, 2^{1211210120047} is an apocalyptic number.

1211210120047 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211210120047 is an equidigital number, since it uses as much as digits as its factorization.

1211210120047 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 22.

Adding to 1211210120047 its reverse (7400210121121), we get a palindrome (8611420241168).

The spelling of 1211210120047 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred twenty thousand, forty-seven".