101222521 has 4 divisors (see below), whose sum is σ = 101995344. Its totient is φ = 100449700.

The previous prime is 101222509. The next prime is 101222543. The reversal of 101222521 is 125222101.

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: 125222101 = 157 ⋅797593.

It is a cyclic number.

It is not a de Polignac number, because 101222521 - 2⁵ = 101222489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101222495 and 101222504.

It is not an unprimeable number, because it can be changed into a prime (101222501) 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, 386215 + ... + 386476.

It is an arithmetic number, because the mean of its divisors is an integer number (25498836).

Almost surely, 2^101222521 is an apocalyptic number.

It is an amenable number.

101222521 is a deficient number, since it is larger than the sum of its proper divisors (772823).

101222521 is an equidigital number, since it uses as much as digits as its factorization.

101222521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772822.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 101222521 is about 10060.9403636042. The cubic root of 101222521 is about 466.0427073165.

Adding to 101222521 its reverse (125222101), we get a palindrome (226444622).

The spelling of 101222521 in words is "one hundred one million, two hundred twenty-two thousand, five hundred twenty-one".