212331113421 has 32 divisors (see below), whose sum is σ = 347531904000. Its totient is φ = 114946156080.

The previous prime is 212331113411. The next prime is 212331113509. The reversal of 212331113421 is 124311133212.

It is not a de Polignac number, because 212331113421 - 2¹⁰ = 212331112397 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212331113391 and 212331113400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212331113411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5410635 + ... + 5449736.

It is an arithmetic number, because the mean of its divisors is an integer number (10860372000).

Almost surely, 2^212331113421 is an apocalyptic number.

212331113421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212331113421 is a deficient number, since it is larger than the sum of its proper divisors (135200790579).

212331113421 is a wasteful number, since it uses less digits than its factorization.

212331113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10860414 (or 10860400 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

Adding to 212331113421 its reverse (124311133212), we get a palindrome (336642246633).

The spelling of 212331113421 in words is "two hundred twelve billion, three hundred thirty-one million, one hundred thirteen thousand, four hundred twenty-one".