1211101212212 has 12 divisors (see below), whose sum is σ = 2211576126816. Its totient is φ = 579222318840.

The previous prime is 1211101212199. The next prime is 1211101212239. The reversal of 1211101212212 is 2122121011121.

It is a super-2 number, since 2×1211101212212² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6582071714 + ... + 6582071897.

It is an arithmetic number, because the mean of its divisors is an integer number (184298010568).

Almost surely, 2^{1211101212212} is an apocalyptic number.

It is an amenable number.

1211101212212 is a deficient number, since it is larger than the sum of its proper divisors (1000474914604).

1211101212212 is a wasteful number, since it uses less digits than its factorization.

1211101212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13164143638 (or 13164143636 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1211101212212 its reverse (2122121011121), we get a palindrome (3333222223333).

The spelling of 1211101212212 in words is "one trillion, two hundred eleven billion, one hundred one million, two hundred twelve thousand, two hundred twelve".