1211012211311 has 8 divisors (see below), whose sum is σ = 1384024017024. Its totient is φ = 1038002920920.

The previous prime is 1211012211307. The next prime is 1211012211317. The reversal of 1211012211311 is 1131122101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211012211311 - 2² = 1211012211307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211012211311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012211317) 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, 550256 + ... + 1650698.

It is an arithmetic number, because the mean of its divisors is an integer number (173003002128).

Almost surely, 2^{1211012211311} is an apocalyptic number.

1211012211311 is a deficient number, since it is larger than the sum of its proper divisors (173011805713).

1211012211311 is a wasteful number, since it uses less digits than its factorization.

1211012211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257661.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1211012211311 its reverse (1131122101121), we get a palindrome (2342134312432).

The spelling of 1211012211311 in words is "one trillion, two hundred eleven billion, twelve million, two hundred eleven thousand, three hundred eleven".