21122010132221 has 8 divisors (see below), whose sum is σ = 21204586642560. Its totient is φ = 21039436643328.

The previous prime is 21122010132211. The next prime is 21122010132227. The reversal of 21122010132221 is 12223101022112.

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

It is a cyclic number.

It is not a de Polignac number, because 21122010132221 - 2¹⁸ = 21122009870077 is a prime.

It is a super-2 number, since 2×21122010132221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122010132193 and 21122010132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122010132227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13800470 + ... + 15254408.

It is an arithmetic number, because the mean of its divisors is an integer number (2650573330320).

Almost surely, 2^{21122010132221} is an apocalyptic number.

It is an amenable number.

21122010132221 is a deficient number, since it is larger than the sum of its proper divisors (82576510339).

21122010132221 is a wasteful number, since it uses less digits than its factorization.

21122010132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510723.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21122010132221 its reverse (12223101022112), we get a palindrome (33345111154333).

The spelling of 21122010132221 in words is "twenty-one trillion, one hundred twenty-two billion, ten million, one hundred thirty-two thousand, two hundred twenty-one".