126120121237 has 32 divisors (see below), whose sum is σ = 148676808960. Its totient is φ = 105696414720.

The previous prime is 126120121163. The next prime is 126120121247. The reversal of 126120121237 is 732121021621.

It is not a de Polignac number, because 126120121237 - 2¹⁹ = 126119596949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126120121247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6065064 + ... + 6085822.

It is an arithmetic number, because the mean of its divisors is an integer number (4646150280).

Almost surely, 2^126120121237 is an apocalyptic number.

126120121237 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126120121237 is a deficient number, since it is larger than the sum of its proper divisors (22556687723).

126120121237 is a wasteful number, since it uses less digits than its factorization.

126120121237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21453.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 126120121237 its reverse (732121021621), we get a palindrome (858241142858).

The spelling of 126120121237 in words is "one hundred twenty-six billion, one hundred twenty million, one hundred twenty-one thousand, two hundred thirty-seven".