2121221102212 has 24 divisors (see below), whose sum is σ = 3922566278400. Its totient is φ = 1001655310656.

The previous prime is 2121221102171. The next prime is 2121221102303. The reversal of 2121221102212 is 2122011221212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121221102212.

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, 145921537 + ... + 145936072.

It is an arithmetic number, because the mean of its divisors is an integer number (163440261600).

Almost surely, 2^{2121221102212} is an apocalyptic number.

It is an amenable number.

2121221102212 is a deficient number, since it is larger than the sum of its proper divisors (1801345176188).

2121221102212 is a wasteful number, since it uses less digits than its factorization.

2121221102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291857715 (or 291857713 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121221102212 its reverse (2122011221212), we get a palindrome (4243232323424).

The spelling of 2121221102212 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, two hundred twelve".