101430021 has 32 divisors (see below), whose sum is σ = 169491456. Its totient is φ = 52416000.

The previous prime is 101430013. The next prime is 101430029. The reversal of 101430021 is 120034101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101430013) and next prime (101430029).

It is not a de Polignac number, because 101430021 - 2³ = 101430013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101429979 and 101430006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101430029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47701 + ... + 49781.

It is an arithmetic number, because the mean of its divisors is an integer number (5296608).

Almost surely, 2^101430021 is an apocalyptic number.

101430021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101430021 is a deficient number, since it is larger than the sum of its proper divisors (68061435).

101430021 is a wasteful number, since it uses less digits than its factorization.

101430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 101430021 is about 10071.2472415287. The cubic root of 101430021 is about 466.3609430114.

Adding to 101430021 its reverse (120034101), we get a palindrome (221464122).

The spelling of 101430021 in words is "one hundred one million, four hundred thirty thousand, twenty-one".