2011321154 has 4 divisors (see below), whose sum is σ = 3016981734. Its totient is φ = 1005660576.

The previous prime is 2011321139. The next prime is 2011321159. The reversal of 2011321154 is 4511231102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1051250929 + 960070225 = 32423^2 + 30985^2 .

It is not an unprimeable number, because it can be changed into a prime (2011321159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502830287 + ... + 502830290.

Almost surely, 2^2011321154 is an apocalyptic number.

2011321154 is a deficient number, since it is larger than the sum of its proper divisors (1005660580).

2011321154 is a wasteful number, since it uses less digits than its factorization.

2011321154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005660579.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2011321154 is about 44847.7552838489. The cubic root of 2011321154 is about 1262.2938717030.

Adding to 2011321154 its reverse (4511231102), we get a palindrome (6522552256).

The spelling of 2011321154 in words is "two billion, eleven million, three hundred twenty-one thousand, one hundred fifty-four".