121013322221 has 6 divisors (see below), whose sum is σ = 133014643566. Its totient is φ = 110012111000.

The previous prime is 121013322181. The next prime is 121013322229. The reversal of 121013322221 is 122223310121.

It can be written as a sum of positive squares in only one way, i.e., 119293561321 + 1719760900 = 345389^2 + 41470^2 .

It is not a de Polignac number, because 121013322221 - 2²² = 121009127917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121013322193 and 121013322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121013322229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500054930 + ... + 500055171.

It is an arithmetic number, because the mean of its divisors is an integer number (22169107261).

Almost surely, 2^121013322221 is an apocalyptic number.

121013322221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121013322221 is a deficient number, since it is larger than the sum of its proper divisors (12001321345).

121013322221 is a wasteful number, since it uses less digits than its factorization.

121013322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000110123 (or 1000110112 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121013322221 its reverse (122223310121), we get a palindrome (243236632342).

The spelling of 121013322221 in words is "one hundred twenty-one billion, thirteen million, three hundred twenty-two thousand, two hundred twenty-one".