2011155151231 has 2 divisors, whose sum is σ = 2011155151232. Its totient is φ = 2011155151230.

The previous prime is 2011155151219. The next prime is 2011155151237. The reversal of 2011155151231 is 1321515511102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011155151231 - 2¹⁵ = 2011155118463 is a prime.

It is a super-2 number, since 2×2011155151231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2011155151231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011155151237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005577575615 + 1005577575616.

It is an arithmetic number, because the mean of its divisors is an integer number (1005577575616).

Almost surely, 2^{2011155151231} is an apocalyptic number.

2011155151231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011155151231 is an equidigital number, since it uses as much as digits as its factorization.

2011155151231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 28.

The spelling of 2011155151231 in words is "two trillion, eleven billion, one hundred fifty-five million, one hundred fifty-one thousand, two hundred thirty-one".