121200221122 has 4 divisors (see below), whose sum is σ = 181800331686. Its totient is φ = 60600110560.

The previous prime is 121200221119. The next prime is 121200221173. The reversal of 121200221122 is 221122002121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221122002121 = 241 ⋅917518681.

It can be written as a sum of positive squares in only one way, i.e., 90697947921 + 30502273201 = 301161^2 + 174649^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121200221096 and 121200221105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30300055279 + ... + 30300055282.

Almost surely, 2^121200221122 is an apocalyptic number.

121200221122 is a deficient number, since it is larger than the sum of its proper divisors (60600110564).

121200221122 is an equidigital number, since it uses as much as digits as its factorization.

121200221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60600110563.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121200221122 its reverse (221122002121), we get a palindrome (342322223243).

The spelling of 121200221122 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty-one thousand, one hundred twenty-two".