2012154051231 has 48 divisors (see below), whose sum is σ = 3006657318912. Its totient is φ = 1295373643200.

The previous prime is 2012154051217. The next prime is 2012154051247. The reversal of 2012154051231 is 1321504512102.

It is a happy number.

2012154051231 is a `hidden beast` number, since 2 + 0 + 1 + 21 + 5 + 405 + 1 + 231 = 666.

It is not a de Polignac number, because 2012154051231 - 2²⁶ = 2012086942367 is a prime.

It is a super-2 number, since 2×2012154051231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2012154051195 and 2012154051204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012154051031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277803096 + ... + 277810338.

It is an arithmetic number, because the mean of its divisors is an integer number (62638694144).

Almost surely, 2^{2012154051231} is an apocalyptic number.

2012154051231 is a deficient number, since it is larger than the sum of its proper divisors (994503267681).

2012154051231 is a wasteful number, since it uses less digits than its factorization.

2012154051231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9284 (or 9281 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 2012154051231 its reverse (1321504512102), we get a palindrome (3333658563333).

The spelling of 2012154051231 in words is "two trillion, twelve billion, one hundred fifty-four million, fifty-one thousand, two hundred thirty-one".