130100021 has 4 divisors (see below), whose sum is σ = 131363232. Its totient is φ = 128836812.

The previous prime is 130100017. The next prime is 130100023. The reversal of 130100021 is 120001031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130100021 - 2² = 130100017 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 = 130099981 and 130100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130100023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631451 + ... + 631656.

It is an arithmetic number, because the mean of its divisors is an integer number (32840808).

Almost surely, 2^130100021 is an apocalyptic number.

It is an amenable number.

130100021 is a deficient number, since it is larger than the sum of its proper divisors (1263211).

130100021 is a wasteful number, since it uses less digits than its factorization.

130100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263210.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 130100021 is about 11406.1396186440. The cubic root of 130100021 is about 506.7095881133.

Adding to 130100021 its reverse (120001031), we get a palindrome (250101052).

The spelling of 130100021 in words is "one hundred thirty million, one hundred thousand, twenty-one".