100121231123 has 8 divisors (see below), whose sum is σ = 103358901120. Its totient is φ = 96884058240.

The previous prime is 100121231099. The next prime is 100121231131. The reversal of 100121231123 is 321132121001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100121231123 - 2⁶ = 100121231059 is a prime.

It is a super-2 number, since 2×100121231123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121231143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309083 + ... + 543851.

It is an arithmetic number, because the mean of its divisors is an integer number (12919862640).

Almost surely, 2^100121231123 is an apocalyptic number.

100121231123 is a deficient number, since it is larger than the sum of its proper divisors (3237669997).

100121231123 is a wasteful number, since it uses less digits than its factorization.

100121231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248557.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 100121231123 its reverse (321132121001), we get a palindrome (421253352124).

The spelling of 100121231123 in words is "one hundred billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred twenty-three".