1211201012 has 18 divisors (see below), whose sum is σ = 2465659602. Its totient is φ = 519086064.

The previous prime is 1211201011. The next prime is 1211201039. The reversal of 1211201012 is 2101021121.

It can be written as a sum of positive squares in only one way, i.e., 627302116 + 583898896 = 25046^2 + 24164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1211200984 and 1211201002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201011) 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, 3089603 + ... + 3089994.

It is an arithmetic number, because the mean of its divisors is an integer number (136981089).

Almost surely, 2^1211201012 is an apocalyptic number.

It is an amenable number.

1211201012 is an abundant number, since it is smaller than the sum of its proper divisors (1254458590).

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

1211201012 is a wasteful number, since it uses less digits than its factorization.

1211201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6179615 (or 6179606 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1211201012 is about 34802.3133139164. The cubic root of 1211201012 is about 1065.9546824623.

Adding to 1211201012 its reverse (2101021121), we get a palindrome (3312222133).

The spelling of 1211201012 in words is "one billion, two hundred eleven million, two hundred one thousand, twelve".