21122210001 has 16 divisors (see below), whose sum is σ = 29137944960. Its totient is φ = 13594103040.

The previous prime is 21122209993. The next prime is 21122210027. The reversal of 21122210001 is 10001222112.

It is not a de Polignac number, because 21122210001 - 2³ = 21122209993 is a prime.

It is a super-2 number, since 2×21122210001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122210401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040121 + ... + 1060233.

It is an arithmetic number, because the mean of its divisors is an integer number (1821121560).

Almost surely, 2^21122210001 is an apocalyptic number.

It is an amenable number.

21122210001 is a deficient number, since it is larger than the sum of its proper divisors (8015734959).

21122210001 is a wasteful number, since it uses less digits than its factorization.

21122210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32216.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21122210001 its reverse (10001222112), we get a palindrome (31123432113).

The spelling of 21122210001 in words is "twenty-one billion, one hundred twenty-two million, two hundred ten thousand, one".