101521429 has 2 divisors, whose sum is σ = 101521430. Its totient is φ = 101521428.

The previous prime is 101521423. The next prime is 101521487. The reversal of 101521429 is 924125101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100460529 + 1060900 = 10023^2 + 1030^2 .

It is an emirp because it is prime and its reverse (924125101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101521429 - 2³ = 101521421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101521421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50760714 + 50760715.

It is an arithmetic number, because the mean of its divisors is an integer number (50760715).

Almost surely, 2^101521429 is an apocalyptic number.

It is an amenable number.

101521429 is a deficient number, since it is larger than the sum of its proper divisors (1).

101521429 is an equidigital number, since it uses as much as digits as its factorization.

101521429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 101521429 is about 10075.7842870915. The cubic root of 101521429 is about 466.5009946495.

The spelling of 101521429 in words is "one hundred one million, five hundred twenty-one thousand, four hundred twenty-nine".