21031222231203 has 8 divisors (see below), whose sum is σ = 28145104290816. Its totient is φ = 13969077496200.

The previous prime is 21031222231193. The next prime is 21031222231231. The reversal of 21031222231203 is 30213222213012.

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

It is not a de Polignac number, because 21031222231203 - 2⁵ = 21031222231171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21031222231273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12934330203 + ... + 12934331828.

It is an arithmetic number, because the mean of its divisors is an integer number (3518138036352).

Almost surely, 2^{21031222231203} is an apocalyptic number.

21031222231203 is a deficient number, since it is larger than the sum of its proper divisors (7113882059613).

21031222231203 is a wasteful number, since it uses less digits than its factorization.

21031222231203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25868662305.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21031222231203 its reverse (30213222213012), we get a palindrome (51244444444215).

The spelling of 21031222231203 in words is "twenty-one trillion, thirty-one billion, two hundred twenty-two million, two hundred thirty-one thousand, two hundred three".