1201245111 has 12 divisors (see below), whose sum is σ = 1892871240. Its totient is φ = 728027280.

The previous prime is 1201245107. The next prime is 1201245131. The reversal of 1201245111 is 1115421021.

1201245111 is a `hidden beast` number, since 1 + 201 + 2 + 451 + 11 = 666.

It is not a de Polignac number, because 1201245111 - 2² = 1201245107 is a prime.

It is a super-4 number, since 4×1201245111⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201245131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6066796 + ... + 6066993.

It is an arithmetic number, because the mean of its divisors is an integer number (157739270).

Almost surely, 2^1201245111 is an apocalyptic number.

1201245111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1201245111 is a deficient number, since it is larger than the sum of its proper divisors (691626129).

1201245111 is a wasteful number, since it uses less digits than its factorization.

1201245111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12133806 (or 12133803 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1201245111 is about 34658.9831212631. The cubic root of 1201245111 is about 1063.0259776590.

Adding to 1201245111 its reverse (1115421021), we get a palindrome (2316666132).

The spelling of 1201245111 in words is "one billion, two hundred one million, two hundred forty-five thousand, one hundred eleven".