101121102221 has 4 divisors (see below), whose sum is σ = 101270469372. Its totient is φ = 100971735072.

The previous prime is 101121102197. The next prime is 101121102259. The reversal of 101121102221 is 122201121101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122201121101 = 304523 ⋅401287.

It can be written as a sum of positive squares in 2 ways, for example, as 97750022500 + 3371079721 = 312650^2 + 58061^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121102221 - 2¹⁰ = 101121101197 is a prime.

It is a super-2 number, since 2×101121102221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101121102196 and 101121102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121102281) 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, 74682560 + ... + 74683913.

It is an arithmetic number, because the mean of its divisors is an integer number (25317617343).

Almost surely, 2^101121102221 is an apocalyptic number.

It is an amenable number.

101121102221 is a deficient number, since it is larger than the sum of its proper divisors (149367151).

101121102221 is an equidigital number, since it uses as much as digits as its factorization.

101121102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149367150.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 101121102221 its reverse (122201121101), we get a palindrome (223322223322).

The spelling of 101121102221 in words is "one hundred one billion, one hundred twenty-one million, one hundred two thousand, two hundred twenty-one".