126051121251 has 24 divisors (see below), whose sum is σ = 199016316720. Its totient is φ = 76244500800.

The previous prime is 126051121243. The next prime is 126051121253. The reversal of 126051121251 is 152121150621.

It is a happy number.

126051121251 is a `hidden beast` number, since 1 + 2 + 605 + 1 + 1 + 2 + 1 + 2 + 51 = 666.

It is not a de Polignac number, because 126051121251 - 2³ = 126051121243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126051121253) 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, 1200340 + ... + 1301121.

It is an arithmetic number, because the mean of its divisors is an integer number (8292346530).

Almost surely, 2^126051121251 is an apocalyptic number.

126051121251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

126051121251 is a deficient number, since it is larger than the sum of its proper divisors (72965195469).

126051121251 is a wasteful number, since it uses less digits than its factorization.

126051121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501987 (or 2501984 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

Adding to 126051121251 its reverse (152121150621), we get a palindrome (278172271872).

The spelling of 126051121251 in words is "one hundred twenty-six billion, fifty-one million, one hundred twenty-one thousand, two hundred fifty-one".