101223421 has 4 divisors (see below), whose sum is σ = 109009852. Its totient is φ = 93436992.

The previous prime is 101223407. The next prime is 101223433. The reversal of 101223421 is 124322101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124322101 = 29 ⋅4286969.

It can be written as a sum of positive squares in 2 ways, for example, as 21031396 + 80192025 = 4586^2 + 8955^2 .

It is a cyclic number.

It is not a de Polignac number, because 101223421 - 2⁹ = 101222909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101223395 and 101223404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101223121) 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, 3893196 + ... + 3893221.

It is an arithmetic number, because the mean of its divisors is an integer number (27252463).

Almost surely, 2^101223421 is an apocalyptic number.

It is an amenable number.

101223421 is a deficient number, since it is larger than the sum of its proper divisors (7786431).

101223421 is an equidigital number, since it uses as much as digits as its factorization.

101223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786430.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 101223421 is about 10060.9850909342. The cubic root of 101223421 is about 466.0440885546.

Adding to 101223421 its reverse (124322101), we get a palindrome (225545522).

The spelling of 101223421 in words is "one hundred one million, two hundred twenty-three thousand, four hundred twenty-one".