121221120122 has 16 divisors (see below), whose sum is σ = 183251214432. Its totient is φ = 60137541360.

The previous prime is 121221120121. The next prime is 121221120169. The reversal of 121221120122 is 221021122121.

It is a self number, because there is not a number n which added to its sum of digits gives 121221120122.

It is not an unprimeable number, because it can be changed into a prime (121221120121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1618433 + ... + 1691675.

It is an arithmetic number, because the mean of its divisors is an integer number (11453200902).

Almost surely, 2^121221120122 is an apocalyptic number.

121221120122 is a deficient number, since it is larger than the sum of its proper divisors (62030094310).

121221120122 is a wasteful number, since it uses less digits than its factorization.

121221120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79693.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221120122 its reverse (221021122121), we get a palindrome (342242242243).

The spelling of 121221120122 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twenty-two".