21013231231122 has 48 divisors (see below), whose sum is σ = 46019269977120. Its totient is φ = 6392962283136.

The previous prime is 21013231231121. The next prime is 21013231231123. The reversal of 21013231231122 is 22113213231012.

It is an interprime number because it is at equal distance from previous prime (21013231231121) and next prime (21013231231123).

It is a junction number, because it is equal to n+sod(n) for n = 21013231231092 and 21013231231101.

It is not an unprimeable number, because it can be changed into a prime (21013231231121) 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 23 ways as a sum of consecutive naturals, for example, 116331708 + ... + 116512199.

It is an arithmetic number, because the mean of its divisors is an integer number (958734791190).

Almost surely, 2^{21013231231122} is an apocalyptic number.

21013231231122 is an abundant number, since it is smaller than the sum of its proper divisors (25006038745998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21013231231122 is a wasteful number, since it uses less digits than its factorization.

21013231231122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232844027 (or 232844014 counting only the distinct ones).

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

Adding to 21013231231122 its reverse (22113213231012), we get a palindrome (43126444462134).

The spelling of 21013231231122 in words is "twenty-one trillion, thirteen billion, two hundred thirty-one million, two hundred thirty-one thousand, one hundred twenty-two".