1211022121212 has 24 divisors (see below), whose sum is σ = 3139686981200. Its totient is φ = 403674040368.

The previous prime is 1211022121189. The next prime is 1211022121301. The reversal of 1211022121212 is 2121212201121.

1211022121212 is a `hidden beast` number, since 1 + 211 + 0 + 221 + 21 + 212 = 666.

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

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, 5606583787 + ... + 5606584002.

Almost surely, 2^{1211022121212} is an apocalyptic number.

1211022121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211022121212 is an abundant number, since it is smaller than the sum of its proper divisors (1928664859988).

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

1211022121212 is a wasteful number, since it uses less digits than its factorization.

1211022121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11213167802 (or 11213167794 counting only the distinct ones).

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

Adding to 1211022121212 its reverse (2121212201121), we get a palindrome (3332234322333).

The spelling of 1211022121212 in words is "one trillion, two hundred eleven billion, twenty-two million, one hundred twenty-one thousand, two hundred twelve".