20220222009991 has 2 divisors, whose sum is σ = 20220222009992. Its totient is φ = 20220222009990.

The previous prime is 20220222009973. The next prime is 20220222010031. The reversal of 20220222009991 is 19990022202202.

It is an a-pointer prime, because the next prime (20220222010031) can be obtained adding 20220222009991 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20220222009991 - 2⁴³ = 11424128987783 is a prime.

It is a super-2 number, since 2×20220222009991² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220222009961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110111004995 + 10110111004996.

It is an arithmetic number, because the mean of its divisors is an integer number (10110111004996).

Almost surely, 2^{20220222009991} is an apocalyptic number.

20220222009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220222009991 is an equidigital number, since it uses as much as digits as its factorization.

20220222009991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 20220222009991 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-two million, nine thousand, nine hundred ninety-one".