101081421 has 48 divisors (see below), whose sum is σ = 174853120. Its totient is φ = 55054080.

The previous prime is 101081417. The next prime is 101081429. The reversal of 101081421 is 124180101.

It is not a de Polignac number, because 101081421 - 2² = 101081417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101081394 and 101081403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101081429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142215 + ... + 142923.

Almost surely, 2^101081421 is an apocalyptic number.

It is an amenable number.

101081421 is a deficient number, since it is larger than the sum of its proper divisors (73771699).

101081421 is a wasteful number, since it uses less digits than its factorization.

101081421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 101081421 is about 10053.9256512071. The cubic root of 101081421 is about 465.8260585445.

The spelling of 101081421 in words is "one hundred one million, eighty-one thousand, four hundred twenty-one".