121220221022 has 4 divisors (see below), whose sum is σ = 181830331536. Its totient is φ = 60610110510.

The previous prime is 121220221021. The next prime is 121220221043. The reversal of 121220221022 is 220122022121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220221021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30305055254 + ... + 30305055257.

It is an arithmetic number, because the mean of its divisors is an integer number (45457582884).

Almost surely, 2^121220221022 is an apocalyptic number.

121220221022 is a deficient number, since it is larger than the sum of its proper divisors (60610110514).

121220221022 is an equidigital number, since it uses as much as digits as its factorization.

121220221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610110513.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121220221022 its reverse (220122022121), we get a palindrome (341342243143).

The spelling of 121220221022 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, twenty-two".