2121221210012 has 24 divisors (see below), whose sum is σ = 3930674202000. Its totient is φ = 998177027840.

The previous prime is 2121221209981. The next prime is 2121221210021. The reversal of 2121221210012 is 2100121221212.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855614 + ... + 2230362.

It is an arithmetic number, because the mean of its divisors is an integer number (163778091750).

Almost surely, 2^{2121221210012} is an apocalyptic number.

It is an amenable number.

2121221210012 is a deficient number, since it is larger than the sum of its proper divisors (1809452991988).

2121221210012 is a wasteful number, since it uses less digits than its factorization.

2121221210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397461 (or 1397459 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121221210012 its reverse (2100121221212), we get a palindrome (4221342431224).

The spelling of 2121221210012 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, twelve".