21122022001 has 8 divisors (see below), whose sum is σ = 21528227304. Its totient is φ = 20716101120.

The previous prime is 21122021971. The next prime is 21122022043. The reversal of 21122022001 is 10022022112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10420326400 + 10701695601 = 102080^2 + 103449^2 .

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 21122022001 - 2⁹ = 21122021489 is a prime.

It is a super-2 number, since 2×21122022001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122022401) 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, 81985 + ... + 221281.

It is an arithmetic number, because the mean of its divisors is an integer number (2691028413).

Almost surely, 2^21122022001 is an apocalyptic number.

It is an amenable number.

21122022001 is a deficient number, since it is larger than the sum of its proper divisors (406205303).

21122022001 is a wasteful number, since it uses less digits than its factorization.

21122022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142211.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21122022001 its reverse (10022022112), we get a palindrome (31144044113).

The spelling of 21122022001 in words is "twenty-one billion, one hundred twenty-two million, twenty-two thousand, one".