2121123311212 has 48 divisors (see below), whose sum is σ = 3767667240960. Its totient is φ = 1044789907392.

The previous prime is 2121123311137. The next prime is 2121123311213. The reversal of 2121123311212 is 2121133211212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2121123311213) 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, 43680498 + ... + 43729030.

It is an arithmetic number, because the mean of its divisors is an integer number (78493067520).

Almost surely, 2^{2121123311212} is an apocalyptic number.

It is an amenable number.

2121123311212 is a deficient number, since it is larger than the sum of its proper divisors (1646543929748).

2121123311212 is a wasteful number, since it uses less digits than its factorization.

2121123311212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49270 (or 49268 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

Adding to 2121123311212 its reverse (2121133211212), we get a palindrome (4242256522424).

The spelling of 2121123311212 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-three million, three hundred eleven thousand, two hundred twelve".