101221022101 has 4 divisors (see below), whose sum is σ = 101251141804. Its totient is φ = 101190902400.

The previous prime is 101221022093. The next prime is 101221022173. The reversal of 101221022101 is 101220122101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101220122101 = 7 ⋅14460017443.

It can be written as a sum of positive squares in 2 ways, for example, as 83604831025 + 17616191076 = 289145^2 + 132726^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221022101 - 2³ = 101221022093 is a prime.

It is a super-2 number, since 2×101221022101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221022191) 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, 15054810 + ... + 15061531.

It is an arithmetic number, because the mean of its divisors is an integer number (25312785451).

Almost surely, 2^101221022101 is an apocalyptic number.

It is an amenable number.

101221022101 is a deficient number, since it is larger than the sum of its proper divisors (30119703).

101221022101 is an equidigital number, since it uses as much as digits as its factorization.

101221022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30119702.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 101221022101 its reverse (101220122101), we get a palindrome (202441144202).

The spelling of 101221022101 in words is "one hundred one billion, two hundred twenty-one million, twenty-two thousand, one hundred one".