21212132113031 has 8 divisors (see below), whose sum is σ = 22328606177280. Its totient is φ = 20095662654648.

The previous prime is 21212132112991. The next prime is 21212132113033. The reversal of 21212132113031 is 13031123121212.

It is a happy number.

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 21212132113031 - 2²⁶ = 21212065004167 is a prime.

It is a super-2 number, since 2×21212132113031² (a number of 27 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 = 21212132112988 and 21212132113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212132113033) 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, 12378170 + ... + 13987256.

It is an arithmetic number, because the mean of its divisors is an integer number (2791075772160).

Almost surely, 2^{21212132113031} is an apocalyptic number.

21212132113031 is a deficient number, since it is larger than the sum of its proper divisors (1116474064249).

21212132113031 is a wasteful number, since it uses less digits than its factorization.

21212132113031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302933.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21212132113031 its reverse (13031123121212), we get a palindrome (34243255234243).

The spelling of 21212132113031 in words is "twenty-one trillion, two hundred twelve billion, one hundred thirty-two million, one hundred thirteen thousand, thirty-one".