101221606 has 4 divisors (see below), whose sum is σ = 151832412. Its totient is φ = 50610802.

The previous prime is 101221591. The next prime is 101221609. The reversal of 101221606 is 606122101.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25305400 + ... + 25305403.

It is an arithmetic number, because the mean of its divisors is an integer number (37958103).

Almost surely, 2^101221606 is an apocalyptic number.

101221606 is a deficient number, since it is larger than the sum of its proper divisors (50610806).

101221606 is an equidigital number, since it uses as much as digits as its factorization.

101221606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50610805.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 101221606 is about 10060.8948906149. The cubic root of 101221606 is about 466.0413030495.

Adding to 101221606 its reverse (606122101), we get a palindrome (707343707).

The spelling of 101221606 in words is "one hundred one million, two hundred twenty-one thousand, six hundred six".