101211111021247 has 2 divisors, whose sum is σ = 101211111021248. Its totient is φ = 101211111021246.

The previous prime is 101211111021187. The next prime is 101211111021253. The reversal of 101211111021247 is 742120111112101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101211111021247 - 2¹⁹ = 101211110496959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101211111021277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605555510623 + 50605555510624.

It is an arithmetic number, because the mean of its divisors is an integer number (50605555510624).

Almost surely, 2^{101211111021247} is an apocalyptic number.

101211111021247 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211111021247 is an equidigital number, since it uses as much as digits as its factorization.

101211111021247 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 25.

Adding to 101211111021247 its reverse (742120111112101), we get a palindrome (843331222133348).

The spelling of 101211111021247 in words is "one hundred one trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, two hundred forty-seven".