1220122123211 has 4 divisors (see below), whose sum is σ = 1220228947392. Its totient is φ = 1220015299032.

The previous prime is 1220122123153. The next prime is 1220122123243. The reversal of 1220122123211 is 1123212210221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220122123211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220122123811) 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, 53394956 + ... + 53417801.

It is an arithmetic number, because the mean of its divisors is an integer number (305057236848).

Almost surely, 2^{1220122123211} is an apocalyptic number.

1220122123211 is a deficient number, since it is larger than the sum of its proper divisors (106824181).

1220122123211 is a wasteful number, since it uses less digits than its factorization.

1220122123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106824180.

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

Adding to 1220122123211 its reverse (1123212210221), we get a palindrome (2343334333432).

The spelling of 1220122123211 in words is "one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred eleven".