1211012122110 has 64 divisors (see below), whose sum is σ = 3340833541632. Its totient is φ = 275202746496.

The previous prime is 1211012122091. The next prime is 1211012122181. The reversal of 1211012122110 is 112212101121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211012122110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16630504 + ... + 16703163.

It is an arithmetic number, because the mean of its divisors is an integer number (52200524088).

Almost surely, 2^{1211012122110} is an apocalyptic number.

1211012122110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211012122110 is an abundant number, since it is smaller than the sum of its proper divisors (2129821419522).

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

1211012122110 is a wasteful number, since it uses less digits than its factorization.

1211012122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333857.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211012122110 its reverse (112212101121), we get a palindrome (1323224223231).

The spelling of 1211012122110 in words is "one trillion, two hundred eleven billion, twelve million, one hundred twenty-two thousand, one hundred ten".