2011656152121 has 32 divisors (see below), whose sum is σ = 3345636704256. Its totient is φ = 1044520896000.

The previous prime is 2011656152117. The next prime is 2011656152173. The reversal of 2011656152121 is 1212516561102.

It is a happy number.

It is not a de Polignac number, because 2011656152121 - 2² = 2011656152117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2011656152101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1575000 + ... + 2550281.

It is an arithmetic number, because the mean of its divisors is an integer number (104551147008).

Almost surely, 2^{2011656152121} is an apocalyptic number.

2011656152121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2011656152121 is a deficient number, since it is larger than the sum of its proper divisors (1333980552135).

2011656152121 is a wasteful number, since it uses less digits than its factorization.

2011656152121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127413.

The product of its (nonzero) digits is 7200, while the sum is 33.

The spelling of 2011656152121 in words is "two trillion, eleven billion, six hundred fifty-six million, one hundred fifty-two thousand, one hundred twenty-one".