221101011201 has 32 divisors (see below), whose sum is σ = 344062391296. Its totient is φ = 123683112000.

The previous prime is 221101011193. The next prime is 221101011211. The reversal of 221101011201 is 102110101122.

It is not a de Polignac number, because 221101011201 - 2³ = 221101011193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221101011211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138715 + ... + 679296.

It is an arithmetic number, because the mean of its divisors is an integer number (10751949728).

Almost surely, 2^221101011201 is an apocalyptic number.

221101011201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221101011201 is a deficient number, since it is larger than the sum of its proper divisors (122961380095).

221101011201 is a wasteful number, since it uses less digits than its factorization.

221101011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818293.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221101011201 its reverse (102110101122), we get a palindrome (323211112323).

The spelling of 221101011201 in words is "two hundred twenty-one billion, one hundred one million, eleven thousand, two hundred one".