212121011121110 has 128 divisors (see below), whose sum is σ = 474342250846464. Its totient is φ = 66505353707520.

The previous prime is 212121011121091. The next prime is 212121011121167. The reversal of 212121011121110 is 11121110121212.

It is a super-3 number, since 3×212121011121110³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39230750 + ... + 44309070.

It is an arithmetic number, because the mean of its divisors is an integer number (3705798834738).

Almost surely, 2^{212121011121110} is an apocalyptic number.

212121011121110 is an abundant number, since it is smaller than the sum of its proper divisors (262221239725354).

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

212121011121110 is a wasteful number, since it uses less digits than its factorization.

212121011121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078778.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 212121011121110 its reverse (11121110121212), we get a palindrome (223242121242322).

The spelling of 212121011121110 in words is "two hundred twelve trillion, one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred ten".