1212211101212 has 24 divisors (see below), whose sum is σ = 2157398575920. Its totient is φ = 595812210560.

The previous prime is 1212211101193. The next prime is 1212211101253. The reversal of 1212211101212 is 2121011122121.

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, 8685662 + ... + 8824122.

It is an arithmetic number, because the mean of its divisors is an integer number (89891607330).

Almost surely, 2^{1212211101212} is an apocalyptic number.

It is an amenable number.

1212211101212 is a deficient number, since it is larger than the sum of its proper divisors (945187474708).

1212211101212 is a wasteful number, since it uses less digits than its factorization.

1212211101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175621 (or 175619 counting only the distinct ones).

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

Adding to 1212211101212 its reverse (2121011122121), we get a palindrome (3333222223333).

The spelling of 1212211101212 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred one thousand, two hundred twelve".