163221426101 has 2 divisors, whose sum is σ = 163221426102. Its totient is φ = 163221426100.

The previous prime is 163221426077. The next prime is 163221426107. The reversal of 163221426101 is 101624122361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151686880900 + 11534545201 = 389470^2 + 107399^2 .

It is a cyclic number.

It is not a de Polignac number, because 163221426101 - 2²⁶ = 163154317237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163221426107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81610713050 + 81610713051.

It is an arithmetic number, because the mean of its divisors is an integer number (81610713051).

Almost surely, 2^163221426101 is an apocalyptic number.

It is an amenable number.

163221426101 is a deficient number, since it is larger than the sum of its proper divisors (1).

163221426101 is an equidigital number, since it uses as much as digits as its factorization.

163221426101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 163221426101 its reverse (101624122361), we get a palindrome (264845548462).

The spelling of 163221426101 in words is "one hundred sixty-three billion, two hundred twenty-one million, four hundred twenty-six thousand, one hundred one".