1101211651611 has 12 divisors (see below), whose sum is σ = 1629435127320. Its totient is φ = 716235220320.

The previous prime is 1101211651607. The next prime is 1101211651651. The reversal of 1101211651611 is 1161561121011.

It is a happy number.

1101211651611 is a `hidden beast` number, since 1 + 1 + 0 + 1 + 2 + 1 + 1 + 651 + 6 + 1 + 1 = 666.

It is not a de Polignac number, because 1101211651611 - 2² = 1101211651607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1101211651651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1492156341 + ... + 1492157078.

It is an arithmetic number, because the mean of its divisors is an integer number (135786260610).

Almost surely, 2^{1101211651611} is an apocalyptic number.

1101211651611 is a deficient number, since it is larger than the sum of its proper divisors (528223475709).

1101211651611 is a wasteful number, since it uses less digits than its factorization.

1101211651611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2984313466 (or 2984313463 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 27.

Adding to 1101211651611 its reverse (1161561121011), we get a palindrome (2262772772622).

The spelling of 1101211651611 in words is "one trillion, one hundred one billion, two hundred eleven million, six hundred fifty-one thousand, six hundred eleven".