100231222421 has 16 divisors (see below), whose sum is σ = 113398669440. Its totient is φ = 87755532480.

The previous prime is 100231222417. The next prime is 100231222439. The reversal of 100231222421 is 124222132001.

It is not a de Polignac number, because 100231222421 - 2² = 100231222417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100231222393 and 100231222402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100231222121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269081 + ... + 522366.

It is an arithmetic number, because the mean of its divisors is an integer number (7087416840).

Almost surely, 2^100231222421 is an apocalyptic number.

100231222421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100231222421 is a deficient number, since it is larger than the sum of its proper divisors (13167447019).

100231222421 is a wasteful number, since it uses less digits than its factorization.

100231222421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791884.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 100231222421 its reverse (124222132001), we get a palindrome (224453354422).

The spelling of 100231222421 in words is "one hundred billion, two hundred thirty-one million, two hundred twenty-two thousand, four hundred twenty-one".