1011213101200 has 60 divisors (see below), whose sum is σ = 2572347697380. Its totient is φ = 380691988480.

The previous prime is 1011213101189. The next prime is 1011213101209. The reversal of 1011213101200 is 21013121101.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 536756224 + 1010676344976 = 23168^2 + 1005324^2 .

It is not an unprimeable number, because it can be changed into a prime (1011213101209) 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, 74347105 + ... + 74360704.

It is an arithmetic number, because the mean of its divisors is an integer number (42872461623).

Almost surely, 2^{1011213101200} is an apocalyptic number.

1011213101200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011213101200 is an abundant number, since it is smaller than the sum of its proper divisors (1561134596180).

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

1011213101200 is a wasteful number, since it uses less digits than its factorization.

1011213101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148707844 (or 148707833 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1011213101200 its reverse (21013121101), we get a palindrome (1032226222301).

The spelling of 1011213101200 in words is "one trillion, eleven billion, two hundred thirteen million, one hundred one thousand, two hundred".