221086397371 has 8 divisors (see below), whose sum is σ = 252683957504. Its totient is φ = 189492284520.

The previous prime is 221086397359. The next prime is 221086397407. The reversal of 221086397371 is 173793680122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-221086397371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221086397351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722895 + ... + 982216.

It is an arithmetic number, because the mean of its divisors is an integer number (31585494688).

Almost surely, 2^221086397371 is an apocalyptic number.

221086397371 is a deficient number, since it is larger than the sum of its proper divisors (31597560133).

221086397371 is a wasteful number, since it uses less digits than its factorization.

221086397371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723641.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 221086397371 in words is "two hundred twenty-one billion, eighty-six million, three hundred ninety-seven thousand, three hundred seventy-one".