100402021043 has 4 divisors (see below), whose sum is σ = 105686337960. Its totient is φ = 95117704128.

The previous prime is 100402021037. The next prime is 100402021051. The reversal of 100402021043 is 340120204001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340120204001 = 359 ⋅947410039.

It is a cyclic number.

It is not a de Polignac number, because 100402021043 - 2¹² = 100402016947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100402021073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642158430 + ... + 2642158467.

It is an arithmetic number, because the mean of its divisors is an integer number (26421584490).

Almost surely, 2^100402021043 is an apocalyptic number.

100402021043 is a deficient number, since it is larger than the sum of its proper divisors (5284316917).

100402021043 is an equidigital number, since it uses as much as digits as its factorization.

100402021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5284316916.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 100402021043 its reverse (340120204001), we get a palindrome (440522225044).

The spelling of 100402021043 in words is "one hundred billion, four hundred two million, twenty-one thousand, forty-three".