100402121441 has 4 divisors (see below), whose sum is σ = 103640899584. Its totient is φ = 97163343300.

The previous prime is 100402121399. The next prime is 100402121447. The reversal of 100402121441 is 144121204001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144121204001 = 43 ⋅3351655907.

It is a cyclic number.

It is not a de Polignac number, because 100402121441 - 2¹⁰ = 100402120417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100402121447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1619389025 + ... + 1619389086.

It is an arithmetic number, because the mean of its divisors is an integer number (25910224896).

Almost surely, 2^100402121441 is an apocalyptic number.

It is an amenable number.

100402121441 is a deficient number, since it is larger than the sum of its proper divisors (3238778143).

100402121441 is an equidigital number, since it uses as much as digits as its factorization.

100402121441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238778142.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 100402121441 its reverse (144121204001), we get a palindrome (244523325442).

The spelling of 100402121441 in words is "one hundred billion, four hundred two million, one hundred twenty-one thousand, four hundred forty-one".