1201525011 has 6 divisors (see below), whose sum is σ = 1735536140. Its totient is φ = 801016668.

The previous prime is 1201524971. The next prime is 1201525019. The reversal of 1201525011 is 1105251021.

1201525011 is a `hidden beast` number, since 12 + 0 + 152 + 501 + 1 = 666.

It is not a de Polignac number, because 1201525011 - 2¹⁷ = 1201393939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201525019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66751381 + ... + 66751398.

Almost surely, 2^1201525011 is an apocalyptic number.

1201525011 is a deficient number, since it is larger than the sum of its proper divisors (534011129).

1201525011 is a wasteful number, since it uses less digits than its factorization.

1201525011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133502785 (or 133502782 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1201525011 is about 34663.0208002707. The cubic root of 1201525011 is about 1063.1085358484.

Adding to 1201525011 its reverse (1105251021), we get a palindrome (2306776032).

It can be divided in two parts, 120 and 1525011, that added together give a triangular number (1525131 = T₁₇₄₆).

The spelling of 1201525011 in words is "one billion, two hundred one million, five hundred twenty-five thousand, eleven".