101230421 has 2 divisors, whose sum is σ = 101230422. Its totient is φ = 101230420.

The previous prime is 101230417. The next prime is 101230511. The reversal of 101230421 is 124032101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100781521 + 448900 = 10039^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 101230421 - 2² = 101230417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101230396 and 101230405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101230411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50615210 + 50615211.

It is an arithmetic number, because the mean of its divisors is an integer number (50615211).

Almost surely, 2^101230421 is an apocalyptic number.

It is an amenable number.

101230421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101230421 is an equidigital number, since it uses as much as digits as its factorization.

101230421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 101230421 is about 10061.3329633802. The cubic root of 101230421 is about 466.0548312378.

Adding to 101230421 its reverse (124032101), we get a palindrome (225262522).

The spelling of 101230421 in words is "one hundred one million, two hundred thirty thousand, four hundred twenty-one".