1212022213121 has 4 divisors (see below), whose sum is σ = 1223349523632. Its totient is φ = 1200694902612.

The previous prime is 1212022213069. The next prime is 1212022213139. The reversal of 1212022213121 is 1213122202121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212022213121 - 2³⁰ = 1210948471297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212022213093 and 1212022213102.

It is not an unprimeable number, because it can be changed into a prime (1212022213421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5663655095 + ... + 5663655308.

It is an arithmetic number, because the mean of its divisors is an integer number (305837380908).

Almost surely, 2^{1212022213121} is an apocalyptic number.

It is an amenable number.

1212022213121 is a deficient number, since it is larger than the sum of its proper divisors (11327310511).

1212022213121 is a wasteful number, since it uses less digits than its factorization.

1212022213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11327310510.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1212022213121 its reverse (1213122202121), we get a palindrome (2425144415242).

The spelling of 1212022213121 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred thirteen thousand, one hundred twenty-one".