11211552045 has 24 divisors (see below), whose sum is σ = 19436911416. Its totient is φ = 5978400768.

The previous prime is 11211551983. The next prime is 11211552061. The reversal of 11211552045 is 54025511211.

It is a happy number.

11211552045 is a `hidden beast` number, since 1 + 121 + 15 + 520 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 109558089 + 11101993956 = 10467^2 + 105366^2 .

It is not a de Polignac number, because 11211552045 - 2¹⁴ = 11211535661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266277 + ... + 305493.

It is an arithmetic number, because the mean of its divisors is an integer number (809871309).

Almost surely, 2^11211552045 is an apocalyptic number.

11211552045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11211552045 is a deficient number, since it is larger than the sum of its proper divisors (8225359371).

11211552045 is a wasteful number, since it uses less digits than its factorization.

11211552045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45581 (or 45578 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The spelling of 11211552045 in words is "eleven billion, two hundred eleven million, five hundred fifty-two thousand, forty-five".