221530020035 has 32 divisors (see below), whose sum is σ = 270007153920. Its totient is φ = 174466512000.

The previous prime is 221530019939. The next prime is 221530020059. The reversal of 221530020035 is 530020035122.

It is a de Polignac number, because none of the positive numbers 2^k-221530020035 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70036364 + ... + 70039526.

It is an arithmetic number, because the mean of its divisors is an integer number (8437723560).

Almost surely, 2^221530020035 is an apocalyptic number.

221530020035 is a deficient number, since it is larger than the sum of its proper divisors (48477133885).

221530020035 is a wasteful number, since it uses less digits than its factorization.

221530020035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4019.

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 221530020035 its reverse (530020035122), we get a palindrome (751550055157).

The spelling of 221530020035 in words is "two hundred twenty-one billion, five hundred thirty million, twenty thousand, thirty-five".