101434431421 has 2 divisors, whose sum is σ = 101434431422. Its totient is φ = 101434431420.

The previous prime is 101434431419. The next prime is 101434431431. The reversal of 101434431421 is 124134434101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67397871321 + 34036560100 = 259611^2 + 184490^2 .

It is an emirp because it is prime and its reverse (124134434101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101434431421 - 2¹ = 101434431419 is a prime.

Together with 101434431419, 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 101434431421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101434431431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50717215710 + 50717215711.

It is an arithmetic number, because the mean of its divisors is an integer number (50717215711).

Almost surely, 2^101434431421 is an apocalyptic number.

It is an amenable number.

101434431421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101434431421 is an equidigital number, since it uses as much as digits as its factorization.

101434431421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 101434431421 its reverse (124134434101), we get a palindrome (225568865522).

The spelling of 101434431421 in words is "one hundred one billion, four hundred thirty-four million, four hundred thirty-one thousand, four hundred twenty-one".