1212120101101 has 32 divisors (see below), whose sum is σ = 1513756160000. Its totient is φ = 944999939520.

The previous prime is 1212120101099. The next prime is 1212120101147. The reversal of 1212120101101 is 1011010212121.

It is a happy number.

It is not a de Polignac number, because 1212120101101 - 2¹ = 1212120101099 is a prime.

It is a super-2 number, since 2×1212120101101² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212120141101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3418366 + ... + 3756256.

It is an arithmetic number, because the mean of its divisors is an integer number (47304880000).

Almost surely, 2^{1212120101101} is an apocalyptic number.

It is an amenable number.

1212120101101 is a deficient number, since it is larger than the sum of its proper divisors (301636058899).

1212120101101 is a wasteful number, since it uses less digits than its factorization.

1212120101101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338489.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212120101101 its reverse (1011010212121), we get a palindrome (2223130313222).

The spelling of 1212120101101 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred one thousand, one hundred one".