121220242 has 16 divisors (see below), whose sum is σ = 213619392. Its totient is φ = 50861520.

The previous prime is 121220213. The next prime is 121220243. The reversal of 121220242 is 242022121.

It is not an unprimeable number, because it can be changed into a prime (121220243) 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, 211638 + ... + 212209.

It is an arithmetic number, because the mean of its divisors is an integer number (13351212).

Almost surely, 2^121220242 is an apocalyptic number.

121220242 is a deficient number, since it is larger than the sum of its proper divisors (92399150).

121220242 is a wasteful number, since it uses less digits than its factorization.

121220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423873.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 121220242 is about 11010.0064486811. The cubic root of 121220242 is about 494.9086550489.

Adding to 121220242 its reverse (242022121), we get a palindrome (363242363).

The spelling of 121220242 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred forty-two".