21122213001 has 12 divisors (see below), whose sum is σ = 29440667088. Its totient is φ = 13469236264.

The previous prime is 21122212963. The next prime is 21122213009. The reversal of 21122213001 is 10031222112.

It is not a de Polignac number, because 21122213001 - 2⁷ = 21122212873 is a prime.

It is a super-2 number, since 2×21122213001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122213009) 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 11 ways as a sum of consecutive naturals, for example, 6653175 + ... + 6656348.

It is an arithmetic number, because the mean of its divisors is an integer number (2453388924).

Almost surely, 2^21122213001 is an apocalyptic number.

It is an amenable number.

21122213001 is a deficient number, since it is larger than the sum of its proper divisors (8318454087).

21122213001 is a wasteful number, since it uses less digits than its factorization.

21122213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13309572 (or 13309549 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21122213001 its reverse (10031222112), we get a palindrome (31153435113).

The spelling of 21122213001 in words is "twenty-one billion, one hundred twenty-two million, two hundred thirteen thousand, one".