120221115145542 has 24 divisors (see below), whose sum is σ = 260531524942416. Its totient is φ = 40065637028976.

The previous prime is 120221115145541. The next prime is 120221115145561. The reversal of 120221115145542 is 245541511122021.

120221115145542 is a `hidden beast` number, since 1 + 2 + 0 + 2 + 2 + 11 + 151 + 455 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 120221115145497 and 120221115145506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221115145541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 672243073 + ... + 672421884.

It is an arithmetic number, because the mean of its divisors is an integer number (10855480205934).

Almost surely, 2^{120221115145542} is an apocalyptic number.

120221115145542 is an abundant number, since it is smaller than the sum of its proper divisors (140310409796874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120221115145542 is a wasteful number, since it uses less digits than its factorization.

120221115145542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344669932 (or 1344669929 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

Adding to 120221115145542 its reverse (245541511122021), we get a palindrome (365762626267563).

The spelling of 120221115145542 in words is "one hundred twenty trillion, two hundred twenty-one billion, one hundred fifteen million, one hundred forty-five thousand, five hundred forty-two".