101231420449 has 2 divisors, whose sum is σ = 101231420450. Its totient is φ = 101231420448.

The previous prime is 101231420431. The next prime is 101231420503. The reversal of 101231420449 is 944024132101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90876322849 + 10355097600 = 301457^2 + 101760^2 .

It is an emirp because it is prime and its reverse (944024132101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101231420449 - 2¹¹ = 101231418401 is a prime.

It is a super-2 number, since 2×101231420449² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101231420449.

It is not a weakly prime, because it can be changed into another prime (101231490449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615710224 + 50615710225.

It is an arithmetic number, because the mean of its divisors is an integer number (50615710225).

Almost surely, 2^101231420449 is an apocalyptic number.

It is an amenable number.

101231420449 is a deficient number, since it is larger than the sum of its proper divisors (1).

101231420449 is an equidigital number, since it uses as much as digits as its factorization.

101231420449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 101231420449 in words is "one hundred one billion, two hundred thirty-one million, four hundred twenty thousand, four hundred forty-nine".