101221097 has 4 divisors (see below), whose sum is σ = 103575120. Its totient is φ = 98867076.

The previous prime is 101221031. The next prime is 101221103. The reversal of 101221097 is 790122101.

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.

It is a cyclic number.

It is not a de Polignac number, because 101221097 - 2¹⁸ = 100958953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221027) 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, 1176947 + ... + 1177032.

It is an arithmetic number, because the mean of its divisors is an integer number (25893780).

Almost surely, 2^101221097 is an apocalyptic number.

It is an amenable number.

101221097 is a deficient number, since it is larger than the sum of its proper divisors (2354023).

101221097 is an equidigital number, since it uses as much as digits as its factorization.

101221097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354022.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 101221097 is about 10060.8695946225. The cubic root of 101221097 is about 466.0405218743.

Adding to 101221097 its reverse (790122101), we get a palindrome (891343198).

The spelling of 101221097 in words is "one hundred one million, two hundred twenty-one thousand, ninety-seven".