101221146265 has 4 divisors (see below), whose sum is σ = 121465375524. Its totient is φ = 80976917008.

The previous prime is 101221146251. The next prime is 101221146293. The reversal of 101221146265 is 562641122101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562641122101 = 4937 ⋅113964173.

It can be written as a sum of positive squares in 2 ways, for example, as 35911766016 + 65309380249 = 189504^2 + 255557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221146265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10122114622 + ... + 10122114631.

It is an arithmetic number, because the mean of its divisors is an integer number (30366343881).

Almost surely, 2^101221146265 is an apocalyptic number.

It is an amenable number.

101221146265 is a deficient number, since it is larger than the sum of its proper divisors (20244229259).

101221146265 is an equidigital number, since it uses as much as digits as its factorization.

101221146265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244229258.

The product of its (nonzero) digits is 5760, while the sum is 31.

Adding to 101221146265 its reverse (562641122101), we get a palindrome (663862268366).

The spelling of 101221146265 in words is "one hundred one billion, two hundred twenty-one million, one hundred forty-six thousand, two hundred sixty-five".