1211212120122 has 48 divisors (see below), whose sum is σ = 2702257459200. Its totient is φ = 391799815776.

The previous prime is 1211212120117. The next prime is 1211212120147. The reversal of 1211212120122 is 2210212121121.

1211212120122 is a `hidden beast` number, since 1 + 211 + 212 + 120 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1211212120095 and 1211212120104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2119122 + ... + 2629277.

It is an arithmetic number, because the mean of its divisors is an integer number (56297030400).

Almost surely, 2^{1211212120122} is an apocalyptic number.

1211212120122 is an abundant number, since it is smaller than the sum of its proper divisors (1491045339078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211212120122 is a wasteful number, since it uses less digits than its factorization.

1211212120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4748827 (or 4748824 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1211212120122 its reverse (2210212121121), we get a palindrome (3421424241243).

Subtracting 1211212120122 from its reverse (2210212121121), we obtain a palindrome (999000000999).

The spelling of 1211212120122 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-two".