100121244442 has 4 divisors (see below), whose sum is σ = 150181866666. Its totient is φ = 50060622220.

The previous prime is 100121244389. The next prime is 100121244521. The reversal of 100121244442 is 244442121001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64979617921 + 35141626521 = 254911^2 + 187461^2 .

It is a super-2 number, since 2×100121244442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25030311109 + ... + 25030311112.

Almost surely, 2^100121244442 is an apocalyptic number.

100121244442 is a deficient number, since it is larger than the sum of its proper divisors (50060622224).

100121244442 is an equidigital number, since it uses as much as digits as its factorization.

100121244442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50060622223.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 100121244442 its reverse (244442121001), we get a palindrome (344563365443).

The spelling of 100121244442 in words is "one hundred billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred forty-two".