101122020221 has 4 divisors (see below), whose sum is σ = 102123228444. Its totient is φ = 100120812000.

The previous prime is 101122020187. The next prime is 101122020239. The reversal of 101122020221 is 122020221101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122020221101 = 101 ⋅1208121001.

It can be written as a sum of positive squares in 2 ways, for example, as 83802144196 + 17319876025 = 289486^2 + 131605^2 .

It is a cyclic number.

It is not a de Polignac number, because 101122020221 - 2⁶ = 101122020157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101122020196 and 101122020205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101122020281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500603960 + ... + 500604161.

It is an arithmetic number, because the mean of its divisors is an integer number (25530807111).

Almost surely, 2^101122020221 is an apocalyptic number.

It is an amenable number.

101122020221 is a deficient number, since it is larger than the sum of its proper divisors (1001208223).

101122020221 is a wasteful number, since it uses less digits than its factorization.

101122020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001208222.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 101122020221 its reverse (122020221101), we get a palindrome (223142241322).

It can be divided in two parts, 101 and 122020221, that multiplied together give a palindrome (12324042321).

The spelling of 101122020221 in words is "one hundred one billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".