1220122121212 has 48 divisors (see below), whose sum is σ = 2256929690400. Its totient is φ = 575556157440.

The previous prime is 1220122121201. The next prime is 1220122121221. The reversal of 1220122121212 is 2121212210221.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1220122121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20601162 + ... + 20660302.

It is an arithmetic number, because the mean of its divisors is an integer number (47019368550).

Almost surely, 2^{1220122121212} is an apocalyptic number.

It is an amenable number.

1220122121212 is a deficient number, since it is larger than the sum of its proper divisors (1036807569188).

1220122121212 is a wasteful number, since it uses less digits than its factorization.

1220122121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60286 (or 60284 counting only the distinct ones).

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

Adding to 1220122121212 its reverse (2121212210221), we get a palindrome (3341334331433).

The spelling of 1220122121212 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".