21212001011122 has 8 divisors (see below), whose sum is σ = 31820569385472. Its totient is φ = 10605144549300.

The previous prime is 21212001011111. The next prime is 21212001011129. The reversal of 21212001011122 is 22111010021212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21212001011096 and 21212001011105.

It is not an unprimeable number, because it can be changed into a prime (21212001011129) 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, 427947154 + ... + 427996717.

It is an arithmetic number, because the mean of its divisors is an integer number (3977571173184).

Almost surely, 2^{21212001011122} is an apocalyptic number.

21212001011122 is a deficient number, since it is larger than the sum of its proper divisors (10608568374350).

21212001011122 is a wasteful number, since it uses less digits than its factorization.

21212001011122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855956264.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212001011122 its reverse (22111010021212), we get a palindrome (43323011032334).

The spelling of 21212001011122 in words is "twenty-one trillion, two hundred twelve billion, one million, eleven thousand, one hundred twenty-two".