1211611154063 has 4 divisors (see below), whose sum is σ = 1218379931640. Its totient is φ = 1204842376488.

The previous prime is 1211611154051. The next prime is 1211611154077. The reversal of 1211611154063 is 3604511161121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211611154063 - 2¹⁴ = 1211611137679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211611174063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3384388520 + ... + 3384388877.

It is an arithmetic number, because the mean of its divisors is an integer number (304594982910).

Almost surely, 2^{1211611154063} is an apocalyptic number.

1211611154063 is a deficient number, since it is larger than the sum of its proper divisors (6768777577).

1211611154063 is an equidigital number, since it uses as much as digits as its factorization.

1211611154063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768777576.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 1211611154063 in words is "one trillion, two hundred eleven billion, six hundred eleven million, one hundred fifty-four thousand, sixty-three".