1211020011212 has 48 divisors (see below), whose sum is σ = 2398892181504. Its totient is φ = 529946496000.

The previous prime is 1211020011193. The next prime is 1211020011221. The reversal of 1211020011212 is 2121100201121.

It is an unprimeable number.

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, 2036864 + ... + 2563367.

It is an arithmetic number, because the mean of its divisors is an integer number (49976920448).

Almost surely, 2^{1211020011212} is an apocalyptic number.

It is an amenable number.

1211020011212 is a deficient number, since it is larger than the sum of its proper divisors (1187872170292).

1211020011212 is a wasteful number, since it uses less digits than its factorization.

1211020011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600470 (or 4600468 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211020011212 its reverse (2121100201121), we get a palindrome (3332120212333).

The spelling of 1211020011212 in words is "one trillion, two hundred eleven billion, twenty million, eleven thousand, two hundred twelve".