101031505249 has 2 divisors, whose sum is σ = 101031505250. Its totient is φ = 101031505248.

The previous prime is 101031505247. The next prime is 101031505259. The reversal of 101031505249 is 942505130101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89959204624 + 11072300625 = 299932^2 + 105225^2 .

It is a cyclic number.

It is not a de Polignac number, because 101031505249 - 2¹ = 101031505247 is a prime.

Together with 101031505247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 101031505249.

It is not a weakly prime, because it can be changed into another prime (101031505247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50515752624 + 50515752625.

It is an arithmetic number, because the mean of its divisors is an integer number (50515752625).

Almost surely, 2^101031505249 is an apocalyptic number.

It is an amenable number.

101031505249 is a deficient number, since it is larger than the sum of its proper divisors (1).

101031505249 is an equidigital number, since it uses as much as digits as its factorization.

101031505249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 101031505249 in words is "one hundred one billion, thirty-one million, five hundred five thousand, two hundred forty-nine".