2111561211151 has 8 divisors (see below), whose sum is σ = 2478434780960. Its totient is φ = 1760993133408.

The previous prime is 2111561211121. The next prime is 2111561211167. The reversal of 2111561211151 is 1511121651112.

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

It is a cyclic number.

It is not a de Polignac number, because 2111561211151 - 2⁹ = 2111561210639 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 (2111561211121) 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, 4076372736 + ... + 4076373253.

It is an arithmetic number, because the mean of its divisors is an integer number (309804347620).

Almost surely, 2^{2111561211151} is an apocalyptic number.

2111561211151 is a deficient number, since it is larger than the sum of its proper divisors (366873569809).

2111561211151 is an equidigital number, since it uses as much as digits as its factorization.

2111561211151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152746033.

The product of its digits is 600, while the sum is 28.

Adding to 2111561211151 its reverse (1511121651112), we get a palindrome (3622682862263).

The spelling of 2111561211151 in words is "two trillion, one hundred eleven billion, five hundred sixty-one million, two hundred eleven thousand, one hundred fifty-one".