21003112213122 has 32 divisors (see below), whose sum is σ = 45238028955840. Its totient is φ = 6462416566080.

The previous prime is 21003112213099. The next prime is 21003112213159. The reversal of 21003112213122 is 22131221130012.

It is a super-2 number, since 2×21003112213122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4889797 + ... + 8118887.

It is an arithmetic number, because the mean of its divisors is an integer number (1413688404870).

Almost surely, 2^{21003112213122} is an apocalyptic number.

21003112213122 is an abundant number, since it is smaller than the sum of its proper divisors (24234916742718).

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

21003112213122 is a wasteful number, since it uses less digits than its factorization.

21003112213122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312498.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21003112213122 its reverse (22131221130012), we get a palindrome (43134333343134).

The spelling of 21003112213122 in words is "twenty-one trillion, three billion, one hundred twelve million, two hundred thirteen thousand, one hundred twenty-two".