221012321035 has 16 divisors (see below), whose sum is σ = 289376916192. Its totient is φ = 160707513600.

The previous prime is 221012321011. The next prime is 221012321069. The reversal of 221012321035 is 530123210122.

It is not a de Polignac number, because 221012321035 - 2²⁷ = 220878103307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221012320997 and 221012321015.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45924 + ... + 666433.

It is an arithmetic number, because the mean of its divisors is an integer number (18086057262).

Almost surely, 2^221012321035 is an apocalyptic number.

221012321035 is a deficient number, since it is larger than the sum of its proper divisors (68364595157).

221012321035 is a wasteful number, since it uses less digits than its factorization.

221012321035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718014.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 221012321035 its reverse (530123210122), we get a palindrome (751135531157).

The spelling of 221012321035 in words is "two hundred twenty-one billion, twelve million, three hundred twenty-one thousand, thirty-five".