22121020001 has 2 divisors, whose sum is σ = 22121020002. Its totient is φ = 22121020000.

The previous prime is 22121019941. The next prime is 22121020027. The reversal of 22121020001 is 10002012122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22089390625 + 31629376 = 148625^2 + 5624^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121020001 - 2²² = 22116825697 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121020081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060510000 + 11060510001.

It is an arithmetic number, because the mean of its divisors is an integer number (11060510001).

Almost surely, 2^22121020001 is an apocalyptic number.

It is an amenable number.

22121020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121020001 is an equidigital number, since it uses as much as digits as its factorization.

22121020001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22121020001 its reverse (10002012122), we get a palindrome (32123032123).

The spelling of 22121020001 in words is "twenty-two billion, one hundred twenty-one million, twenty thousand, one".