121220121022012 has 48 divisors (see below), whose sum is σ = 227201400528480. Its totient is φ = 56387943299072.

The previous prime is 121220121021991. The next prime is 121220121022019. The reversal of 121220121022012 is 210220121022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220121022019) 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, 18711423 + ... + 24342505.

It is an arithmetic number, because the mean of its divisors is an integer number (4733362511010).

Almost surely, 2^{121220121022012} is an apocalyptic number.

It is an amenable number.

121220121022012 is a deficient number, since it is larger than the sum of its proper divisors (105981279506468).

121220121022012 is a wasteful number, since it uses less digits than its factorization.

121220121022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634750 (or 5634748 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121220121022012 its reverse (210220121022121), we get a palindrome (331440242044133).

The spelling of 121220121022012 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, twenty-two thousand, twelve".