1201011012 has 18 divisors (see below), whose sum is σ = 3035889038. Its totient is φ = 400336992.

The previous prime is 1201011011. The next prime is 1201011043. The reversal of 1201011012 is 2101101021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1025024256 + 175986756 = 32016^2 + 13266^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1201010985 and 1201011003.

It is not an unprimeable number, because it can be changed into a prime (1201011011) 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, 16680673 + ... + 16680744.

Almost surely, 2^1201011012 is an apocalyptic number.

1201011012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1201011012 is an abundant number, since it is smaller than the sum of its proper divisors (1834878026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201011012 is a wasteful number, since it uses less digits than its factorization.

1201011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33361427 (or 33361422 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1201011012 is about 34655.6057803063. The cubic root of 1201011012 is about 1062.9569189011.

Adding to 1201011012 its reverse (2101101021), we get a palindrome (3302112033).

Subtracting 1201011012 from its reverse (2101101021), we obtain a palindrome (900090009).

The spelling of 1201011012 in words is "one billion, two hundred one million, eleven thousand, twelve".