1211011320216 has 32 divisors (see below), whose sum is σ = 3029111022960. Its totient is φ = 403459410432.

The previous prime is 1211011320209. The next prime is 1211011320217. The reversal of 1211011320216 is 6120231101121.

It is a junction number, because it is equal to n+sod(n) for n = 1211011320192 and 1211011320201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211011320217) 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, 13142485 + ... + 13234308.

Almost surely, 2^{1211011320216} is an apocalyptic number.

It is an amenable number.

1211011320216 is an abundant number, since it is smaller than the sum of its proper divisors (1818099702744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211011320216 is a wasteful number, since it uses less digits than its factorization.

1211011320216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26378715 (or 26378711 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1211011320216 its reverse (6120231101121), we get a palindrome (7331242421337).

The spelling of 1211011320216 in words is "one trillion, two hundred eleven billion, eleven million, three hundred twenty thousand, two hundred sixteen".