2155423022011 has 12 divisors (see below), whose sum is σ = 2507737996992. Its totient is φ = 1847203949808.

The previous prime is 2155423021951. The next prime is 2155423022017. The reversal of 2155423022011 is 1102203245512.

It is a happy number.

It is not a de Polignac number, because 2155423022011 - 2²¹ = 2155420924859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155423022017) 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, 3285675 + ... + 3886708.

It is an arithmetic number, because the mean of its divisors is an integer number (208978166416).

Almost surely, 2^{2155423022011} is an apocalyptic number.

2155423022011 is a deficient number, since it is larger than the sum of its proper divisors (352314974981).

2155423022011 is an equidigital number, since it uses as much as digits as its factorization.

2155423022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7178530 (or 7178523 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2155423022011 its reverse (1102203245512), we get a palindrome (3257626267523).

The spelling of 2155423022011 in words is "two trillion, one hundred fifty-five billion, four hundred twenty-three million, twenty-two thousand, eleven".