1211020223212 has 12 divisors (see below), whose sum is σ = 2119293703800. Its totient is φ = 605507736416.

The previous prime is 1211020223207. The next prime is 1211020223227. The reversal of 1211020223212 is 2123220201121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211020223212.

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, 1073664 + ... + 1890712.

It is an arithmetic number, because the mean of its divisors is an integer number (176607808650).

Almost surely, 2^{1211020223212} is an apocalyptic number.

It is an amenable number.

1211020223212 is a deficient number, since it is larger than the sum of its proper divisors (908273480588).

1211020223212 is a wasteful number, since it uses less digits than its factorization.

1211020223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187600 (or 1187598 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1211020223212 its reverse (2123220201121), we get a palindrome (3334240424333).

The spelling of 1211020223212 in words is "one trillion, two hundred eleven billion, twenty million, two hundred twenty-three thousand, two hundred twelve".