127121601156 has 48 divisors (see below), whose sum is σ = 324257955840. Its totient is φ = 38441257120.

The previous prime is 127121601107. The next prime is 127121601157. The reversal of 127121601156 is 651106121721.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (127121601157) 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, 942036 + ... + 1068491.

It is an arithmetic number, because the mean of its divisors is an integer number (6755374080).

Almost surely, 2^127121601156 is an apocalyptic number.

It is an amenable number.

127121601156 is an abundant number, since it is smaller than the sum of its proper divisors (197136354684).

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

127121601156 is a wasteful number, since it uses less digits than its factorization.

127121601156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011024 (or 2011022 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

Adding to 127121601156 its reverse (651106121721), we get a palindrome (778227722877).

The spelling of 127121601156 in words is "one hundred twenty-seven billion, one hundred twenty-one million, six hundred one thousand, one hundred fifty-six".