1211020211012 has 6 divisors (see below), whose sum is σ = 2119285369278. Its totient is φ = 605510105504.

The previous prime is 1211020210999. The next prime is 1211020211029. The reversal of 1211020211012 is 2101120201121.

It can be written as a sum of positive squares in only one way, i.e., 1196275937536 + 14744273476 = 1093744^2 + 121426^2 .

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 as a sum of consecutive naturals, namely, 151377526373 + ... + 151377526380.

It is an arithmetic number, because the mean of its divisors is an integer number (353214228213).

Almost surely, 2^{1211020211012} is an apocalyptic number.

It is an amenable number.

1211020211012 is a deficient number, since it is larger than the sum of its proper divisors (908265158266).

1211020211012 is a wasteful number, since it uses less digits than its factorization.

1211020211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302755052757 (or 302755052755 counting only the distinct ones).

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

Adding to 1211020211012 its reverse (2101120201121), we get a palindrome (3312140412133).

The spelling of 1211020211012 in words is "one trillion, two hundred eleven billion, twenty million, two hundred eleven thousand, twelve".