103111210021221 has 24 divisors (see below), whose sum is σ = 158238390044280. Its totient is φ = 64576638516096.

The previous prime is 103111210021177. The next prime is 103111210021223. The reversal of 103111210021221 is 122120012111301.

It is a happy number.

103111210021221 is a `hidden beast` number, since 1 + 0 + 311 + 12 + 100 + 21 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 33847436801025 + 69263773220196 = 5817855^2 + 8322486^2 .

It is not a de Polignac number, because 103111210021221 - 2¹¹ = 103111210019173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103111210021194 and 103111210021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103111210021223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5338667470 + ... + 5338686783.

It is an arithmetic number, because the mean of its divisors is an integer number (6593266251845).

Almost surely, 2^{103111210021221} is an apocalyptic number.

It is an amenable number.

103111210021221 is a deficient number, since it is larger than the sum of its proper divisors (55127180023059).

103111210021221 is a wasteful number, since it uses less digits than its factorization.

103111210021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677354325 (or 10677354322 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 103111210021221 its reverse (122120012111301), we get a palindrome (225231222132522).

The spelling of 103111210021221 in words is "one hundred three trillion, one hundred eleven billion, two hundred ten million, twenty-one thousand, two hundred twenty-one".