1200011111010 has 192 divisors, whose sum is σ = 3253952209248. Its totient is φ = 306550075392.

The previous prime is 1200011110979. The next prime is 1200011111017. The reversal of 1200011111010 is 101111100021.

It can be written as a sum of positive squares in 16 ways, for example, as 152186592321 + 1047824518689 = 390111^2 + 1023633^2 .

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 = 1200011110983 and 1200011111001.

It is not an unprimeable number, because it can be changed into a prime (1200011111017) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 149010144 + ... + 149018196.

Almost surely, 2^{1200011111010} is an apocalyptic number.

1200011111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200011111010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626976104624).

1200011111010 is an abundant number, since it is smaller than the sum of its proper divisors (2053941098238).

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

1200011111010 is a wasteful number, since it uses less digits than its factorization.

1200011111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8789 (or 8786 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1200011111010 its reverse (101111100021), we get a palindrome (1301122211031).

The spelling of 1200011111010 in words is "one trillion, two hundred billion, eleven million, one hundred eleven thousand, ten".