123341551221 has 16 divisors (see below), whose sum is σ = 189074479104. Its totient is φ = 70058843184.

The previous prime is 123341551217. The next prime is 123341551241. The reversal of 123341551221 is 122155143321.

It is a happy number.

It is not a de Polignac number, because 123341551221 - 2² = 123341551217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123341551241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17581545 + ... + 17588558.

It is an arithmetic number, because the mean of its divisors is an integer number (11817154944).

Almost surely, 2^123341551221 is an apocalyptic number.

It is an amenable number.

123341551221 is a deficient number, since it is larger than the sum of its proper divisors (65732927883).

123341551221 is a wasteful number, since it uses less digits than its factorization.

123341551221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35170280.

The product of its digits is 7200, while the sum is 30.

Adding to 123341551221 its reverse (122155143321), we get a palindrome (245496694542).

The spelling of 123341551221 in words is "one hundred twenty-three billion, three hundred forty-one million, five hundred fifty-one thousand, two hundred twenty-one".