120553001220421 has 24 divisors (see below), whose sum is σ = 153045534904416. Its totient is φ = 93899478647520.

The previous prime is 120553001220409. The next prime is 120553001220469. The reversal of 120553001220421 is 124022100355021.

It is a happy number.

It is not a de Polignac number, because 120553001220421 - 2²⁷ = 120552867002693 is a prime.

It is a super-2 number, since 2×120553001220421² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120553001220421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120553001250421) 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, 43812351 + ... + 46482556.

It is an arithmetic number, because the mean of its divisors is an integer number (6376897287684).

Almost surely, 2^{120553001220421} is an apocalyptic number.

120553001220421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120553001220421 is a deficient number, since it is larger than the sum of its proper divisors (32492533683995).

120553001220421 is a wasteful number, since it uses less digits than its factorization.

120553001220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90297409 (or 90297402 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 120553001220421 its reverse (124022100355021), we get a palindrome (244575101575442).

The spelling of 120553001220421 in words is "one hundred twenty trillion, five hundred fifty-three billion, one million, two hundred twenty thousand, four hundred twenty-one".