221071271922 has 270 divisors, whose sum is σ = 549732769509. Its totient is φ = 66387409920.

The previous prime is 221071271893. The next prime is 221071271923. The reversal of 221071271922 is 229172170122.

It can be written as a sum of positive squares in 14 ways, for example, as 350775441 + 220720496481 = 18729^2 + 469809^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332469.

It is not an unprimeable number, because it can be changed into a prime (221071271923) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 4171156048 + ... + 4171156100.

Almost surely, 2^221071271922 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221071271922

221071271922 is an abundant number, since it is smaller than the sum of its proper divisors (328661497587).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221071271922 is an equidigital number, since it uses as much as digits as its factorization.

221071271922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The spelling of 221071271922 in words is "two hundred twenty-one billion, seventy-one million, two hundred seventy-one thousand, nine hundred twenty-two".