1211121020212 has 24 divisors (see below), whose sum is σ = 2160688382496. Its totient is φ = 593794569888.

The previous prime is 1211121020177. The next prime is 1211121020227. The reversal of 1211121020212 is 2120201211121.

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, 1264678 + ... + 2005405.

It is an arithmetic number, because the mean of its divisors is an integer number (90028682604).

Almost surely, 2^{1211121020212} is an apocalyptic number.

It is an amenable number.

1211121020212 is a deficient number, since it is larger than the sum of its proper divisors (949567362284).

1211121020212 is a wasteful number, since it uses less digits than its factorization.

1211121020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271887 (or 3271885 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211121020212 its reverse (2120201211121), we get a palindrome (3331322231333).

The spelling of 1211121020212 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, twenty thousand, two hundred twelve".