1000121111210 has 16 divisors (see below), whose sum is σ = 1938696308136. Its totient is φ = 369275487168.

The previous prime is 1000121111191. The next prime is 1000121111219. The reversal of 1000121111210 is 121111210001.

It can be written as a sum of positive squares in 4 ways, for example, as 405283751161 + 594837360049 = 636619^2 + 771257^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000121111191 and 1000121111200.

It is not an unprimeable number, because it can be changed into a prime (1000121111219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3846619529 + ... + 3846619788.

Almost surely, 2^{1000121111210} is an apocalyptic number.

1000121111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000121111210 is a deficient number, since it is larger than the sum of its proper divisors (938575196926).

1000121111210 is a wasteful number, since it uses less digits than its factorization.

1000121111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693239337.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1000121111210 its reverse (121111210001), we get a palindrome (1121232321211).

The spelling of 1000121111210 in words is "one trillion, one hundred twenty-one million, one hundred eleven thousand, two hundred ten".