1212100111010 has 16 divisors (see below), whose sum is σ = 2310120211896. Its totient is φ = 456320041728.

The previous prime is 1212100111009. The next prime is 1212100111031. The reversal of 1212100111010 is 101110012121.

It can be written as a sum of positive squares in 4 ways, for example, as 946092764929 + 266007346081 = 972673^2 + 515759^2 .

It is a super-2 number, since 2×1212100111010² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212100110982 and 1212100111000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3565000157 + ... + 3565000496.

Almost surely, 2^{1212100111010} is an apocalyptic number.

1212100111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212100111010 is a deficient number, since it is larger than the sum of its proper divisors (1098020100886).

1212100111010 is a wasteful number, since it uses less digits than its factorization.

1212100111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7130000677.

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

Adding to 1212100111010 its reverse (101110012121), we get a palindrome (1313210123131).

The spelling of 1212100111010 in words is "one trillion, two hundred twelve billion, one hundred million, one hundred eleven thousand, ten".