1211021200212 has 24 divisors (see below), whose sum is σ = 2840510464512. Its totient is φ = 401560257600.

The previous prime is 1211021200201. The next prime is 1211021200219. The reversal of 1211021200212 is 2120021201121.

It is a junction number, because it is equal to n+sod(n) for n = 1211021200191 and 1211021200200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211021200219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264182089 + ... + 264186672.

It is an arithmetic number, because the mean of its divisors is an integer number (118354602688).

Almost surely, 2^{1211021200212} is an apocalyptic number.

1211021200212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211021200212 is an abundant number, since it is smaller than the sum of its proper divisors (1629489264300).

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

1211021200212 is a wasteful number, since it uses less digits than its factorization.

1211021200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528368959 (or 528368957 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1211021200212 its reverse (2120021201121), we get a palindrome (3331042401333).

Subtracting 1211021200212 from its reverse (2120021201121), we obtain a palindrome (909000000909).

The spelling of 1211021200212 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred thousand, two hundred twelve".