221060372721 has 16 divisors (see below), whose sum is σ = 310305696000. Its totient is φ = 139596591888.

The previous prime is 221060372711. The next prime is 221060372723. The reversal of 221060372721 is 127273060122.

It is not a de Polignac number, because 221060372721 - 2¹³ = 221060364529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221060372723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112170 + ... + 674316.

It is an arithmetic number, because the mean of its divisors is an integer number (19394106000).

Almost surely, 2^221060372721 is an apocalyptic number.

It is an amenable number.

221060372721 is a deficient number, since it is larger than the sum of its proper divisors (89245323279).

221060372721 is a wasteful number, since it uses less digits than its factorization.

221060372721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569068.

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 221060372721 in words is "two hundred twenty-one billion, sixty million, three hundred seventy-two thousand, seven hundred twenty-one".