101211211247 has 2 divisors, whose sum is σ = 101211211248. Its totient is φ = 101211211246.

The previous prime is 101211211223. The next prime is 101211211331. The reversal of 101211211247 is 742112112101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101211211247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101211216247) 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, 50605605623 + 50605605624.

It is an arithmetic number, because the mean of its divisors is an integer number (50605605624).

Almost surely, 2^101211211247 is an apocalyptic number.

101211211247 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211211247 is an equidigital number, since it uses as much as digits as its factorization.

101211211247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 101211211247 its reverse (742112112101), we get a palindrome (843323323348).

The spelling of 101211211247 in words is "one hundred one billion, two hundred eleven million, two hundred eleven thousand, two hundred forty-seven".