127121051 has 4 divisors (see below), whose sum is σ = 127153272. Its totient is φ = 127088832.

The previous prime is 127121047. The next prime is 127121063. The reversal of 127121051 is 150121721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 150121721 = 281 ⋅534241.

It is a cyclic number.

It is not a de Polignac number, because 127121051 - 2² = 127121047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127121081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9206 + ... + 18411.

It is an arithmetic number, because the mean of its divisors is an integer number (31788318).

Almost surely, 2^127121051 is an apocalyptic number.

127121051 is the 9206-th pentagonal number.

127121051 is a deficient number, since it is larger than the sum of its proper divisors (32221).

127121051 is an equidigital number, since it uses as much as digits as its factorization.

127121051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32220.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 127121051 is about 11274.7971600380. The cubic root of 127121051 is about 502.8122211699.

Adding to 127121051 its reverse (150121721), we get a palindrome (277242772).

It can be divided in two parts, 1271 and 21051, that added together give a palindrome (22322).

The spelling of 127121051 in words is "one hundred twenty-seven million, one hundred twenty-one thousand, fifty-one".