221201112121022 has 32 divisors (see below), whose sum is σ = 383258540473344. Its totient is φ = 94631245244800.

The previous prime is 221201112121001. The next prime is 221201112121027. The reversal of 221201112121022 is 220121211102122.

It is a junction number, because it is equal to n+sod(n) for n = 221201112120985 and 221201112121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201112121027) 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, 269911697 + ... + 270729987.

It is an arithmetic number, because the mean of its divisors is an integer number (11976829389792).

Almost surely, 2^{221201112121022} is an apocalyptic number.

221201112121022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221201112121022 is a deficient number, since it is larger than the sum of its proper divisors (162057428352322).

221201112121022 is a wasteful number, since it uses less digits than its factorization.

221201112121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541104.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221201112121022 its reverse (220121211102122), we get a palindrome (441322323223144).

The spelling of 221201112121022 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twelve million, one hundred twenty-one thousand, twenty-two".