102230021 has 4 divisors (see below), whose sum is σ = 103461792. Its totient is φ = 100998252.

The previous prime is 102229997. The next prime is 102230039. The reversal of 102230021 is 120032201.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120032201 = 61 ⋅1967741.

It is a cyclic number.

It is not a de Polignac number, because 102230021 - 2⁶ = 102229957 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 = 102229984 and 102230011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102230521) 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, 615761 + ... + 615926.

It is an arithmetic number, because the mean of its divisors is an integer number (25865448).

Almost surely, 2^102230021 is an apocalyptic number.

It is an amenable number.

102230021 is a deficient number, since it is larger than the sum of its proper divisors (1231771).

102230021 is an equidigital number, since it uses as much as digits as its factorization.

102230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231770.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102230021 is about 10110.8862618467. The cubic root of 102230021 is about 467.5838293247.

Adding to 102230021 its reverse (120032201), we get a palindrome (222262222).

The spelling of 102230021 in words is "one hundred two million, two hundred thirty thousand, twenty-one".