1212201101000 has 32 divisors (see below), whose sum is σ = 2836550578680. Its totient is φ = 484880440000.

The previous prime is 1212201100987. The next prime is 1212201101009. The reversal of 1212201101000 is 1011022121.

It can be written as a sum of positive squares in 4 ways, for example, as 673847257924 + 538353843076 = 820882^2 + 733726^2 .

It is a super-2 number, since 2×1212201101000² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212201101009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606099551 + ... + 606101550.

Almost surely, 2^{1212201101000} is an apocalyptic number.

1212201101000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212201101000 is an abundant number, since it is smaller than the sum of its proper divisors (1624349477680).

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

1212201101000 is a wasteful number, since it uses less digits than its factorization.

1212201101000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212201122 (or 1212201108 counting only the distinct ones).

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

Adding to 1212201101000 its reverse (1011022121), we get a palindrome (1213212123121).

The spelling of 1212201101000 in words is "one trillion, two hundred twelve billion, two hundred one million, one hundred one thousand".