100121222231231 has 4 divisors (see below), whose sum is σ = 100793176743000. Its totient is φ = 99449267719464.

The previous prime is 100121222231221. The next prime is 100121222231243. The reversal of 100121222231231 is 132132222121001.

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

It is a cyclic number.

It is not a de Polignac number, because 100121222231231 - 2¹⁰ = 100121222230207 is a prime.

It is a super-2 number, since 2×100121222231231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121222231197 and 100121222231206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121222231221) 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, 335977255661 + ... + 335977255958.

It is an arithmetic number, because the mean of its divisors is an integer number (25198294185750).

Almost surely, 2^{100121222231231} is an apocalyptic number.

100121222231231 is a deficient number, since it is larger than the sum of its proper divisors (671954511769).

100121222231231 is an equidigital number, since it uses as much as digits as its factorization.

100121222231231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671954511768.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 100121222231231 its reverse (132132222121001), we get a palindrome (232253444352232).

The spelling of 100121222231231 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred thirty-one".