121342425556 has 12 divisors (see below), whose sum is σ = 231653721600. Its totient is φ = 55155647960.

The previous prime is 121342425541. The next prime is 121342425557. The reversal of 121342425556 is 655524243121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121342425557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378891156 + ... + 1378891243.

It is an arithmetic number, because the mean of its divisors is an integer number (19304476800).

Almost surely, 2^121342425556 is an apocalyptic number.

It is an amenable number.

121342425556 is a deficient number, since it is larger than the sum of its proper divisors (110311296044).

121342425556 is a wasteful number, since it uses less digits than its factorization.

121342425556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757782414 (or 2757782412 counting only the distinct ones).

The product of its digits is 288000, while the sum is 40.

Adding to 121342425556 its reverse (655524243121), we get a palindrome (776866668677).

The spelling of 121342425556 in words is "one hundred twenty-one billion, three hundred forty-two million, four hundred twenty-five thousand, five hundred fifty-six".