1211011021212 has 48 divisors (see below), whose sum is σ = 2964660916224. Its totient is φ = 384244632000.

The previous prime is 1211011021189. The next prime is 1211011021219. The reversal of 1211011021212 is 2121201101121.

It is a happy number.

It is a super-2 number, since 2×1211011021212² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211011021191 and 1211011021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26660964 + ... + 26706347.

It is an arithmetic number, because the mean of its divisors is an integer number (61763769088).

Almost surely, 2^{1211011021212} is an apocalyptic number.

1211011021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211011021212 is an abundant number, since it is smaller than the sum of its proper divisors (1753649895012).

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

1211011021212 is a wasteful number, since it uses less digits than its factorization.

1211011021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53367410 (or 53367408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211011021212 its reverse (2121201101121), we get a palindrome (3332212122333).

The spelling of 1211011021212 in words is "one trillion, two hundred eleven billion, eleven million, twenty-one thousand, two hundred twelve".