21120010031229 has 4 divisors (see below), whose sum is σ = 28160013374976. Its totient is φ = 14080006687484.

The previous prime is 21120010031221. The next prime is 21120010031243. The reversal of 21120010031229 is 92213001002112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21120010031229 - 2³ = 21120010031221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120010031199 and 21120010031208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120010031221) 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, 3520001671869 + ... + 3520001671874.

It is an arithmetic number, because the mean of its divisors is an integer number (7040003343744).

Almost surely, 2^{21120010031229} is an apocalyptic number.

It is an amenable number.

21120010031229 is a deficient number, since it is larger than the sum of its proper divisors (7040003343747).

21120010031229 is an equidigital number, since it uses as much as digits as its factorization.

21120010031229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040003343746.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 21120010031229 in words is "twenty-one trillion, one hundred twenty billion, ten million, thirty-one thousand, two hundred twenty-nine".