121130223221 has 24 divisors (see below), whose sum is σ = 143465824320. Its totient is φ = 100180636416.

The previous prime is 121130223209. The next prime is 121130223239. The reversal of 121130223221 is 122322031121.

It is not a de Polignac number, because 121130223221 - 2²² = 121126028917 is a prime.

It is a super-2 number, since 2×121130223221² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121130223193 and 121130223202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121130223421) 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, 10455410 + ... + 10466988.

It is an arithmetic number, because the mean of its divisors is an integer number (5977742680).

Almost surely, 2^121130223221 is an apocalyptic number.

It is an amenable number.

121130223221 is a deficient number, since it is larger than the sum of its proper divisors (22335601099).

121130223221 is a wasteful number, since it uses less digits than its factorization.

121130223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13421 (or 13392 counting only the distinct ones).

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

Adding to 121130223221 its reverse (122322031121), we get a palindrome (243452254342).

The spelling of 121130223221 in words is "one hundred twenty-one billion, one hundred thirty million, two hundred twenty-three thousand, two hundred twenty-one".