1211001110212 has 24 divisors (see below), whose sum is σ = 2151758437920. Its totient is φ = 596220345600.

The previous prime is 1211001110201. The next prime is 1211001110213. The reversal of 1211001110212 is 2120111001121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211001110192 and 1211001110201.

It is not an unprimeable number, because it can be changed into a prime (1211001110213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259789 + ... + 1577812.

It is an arithmetic number, because the mean of its divisors is an integer number (89656601580).

Almost surely, 2^{1211001110212} is an apocalyptic number.

It is an amenable number.

1211001110212 is a deficient number, since it is larger than the sum of its proper divisors (940757327708).

1211001110212 is a wasteful number, since it uses less digits than its factorization.

1211001110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840131 (or 1840129 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1211001110212 its reverse (2120111001121), we get a palindrome (3331112111333).

The spelling of 1211001110212 in words is "one trillion, two hundred eleven billion, one million, one hundred ten thousand, two hundred twelve".