100311213421 has 4 divisors (see below), whose sum is σ = 106211873052. Its totient is φ = 94410553792.

The previous prime is 100311213407. The next prime is 100311213427. The reversal of 100311213421 is 124312113001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55373149225 + 44938064196 = 235315^2 + 211986^2 .

It is a cyclic number.

It is not a de Polignac number, because 100311213421 - 2⁷ = 100311213293 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 (100311213427) 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, 2950329790 + ... + 2950329823.

It is an arithmetic number, because the mean of its divisors is an integer number (26552968263).

Almost surely, 2^100311213421 is an apocalyptic number.

It is an amenable number.

100311213421 is a deficient number, since it is larger than the sum of its proper divisors (5900659631).

100311213421 is an equidigital number, since it uses as much as digits as its factorization.

100311213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5900659630.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 100311213421 its reverse (124312113001), we get a palindrome (224623326422).

The spelling of 100311213421 in words is "one hundred billion, three hundred eleven million, two hundred thirteen thousand, four hundred twenty-one".