22001221193929 has 2 divisors, whose sum is σ = 22001221193930. Its totient is φ = 22001221193928.

The previous prime is 22001221193921. The next prime is 22001221193947. The reversal of 22001221193929 is 92939112210022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12413361027600 + 9587860166329 = 3523260^2 + 3096427^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001221193929 - 2³ = 22001221193921 is a prime.

It is a super-2 number, since 2×22001221193929² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22001221193921) 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 as a sum of consecutive naturals, namely, 11000610596964 + 11000610596965.

It is an arithmetic number, because the mean of its divisors is an integer number (11000610596965).

Almost surely, 2^{22001221193929} is an apocalyptic number.

It is an amenable number.

22001221193929 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001221193929 is an equidigital number, since it uses as much as digits as its factorization.

22001221193929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 22001221193929 in words is "twenty-two trillion, one billion, two hundred twenty-one million, one hundred ninety-three thousand, nine hundred twenty-nine".