1220110121211 has 64 divisors (see below), whose sum is σ = 1755928903680. Its totient is φ = 751163984640.

The previous prime is 1220110121201. The next prime is 1220110121227. The reversal of 1220110121211 is 1121210110221.

It is a happy number.

It is not a de Polignac number, because 1220110121211 - 2¹⁷ = 1220109990139 is a prime.

It is a super-2 number, since 2×1220110121211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220110121201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1147798266 + ... + 1147799328.

It is an arithmetic number, because the mean of its divisors is an integer number (27436389120).

Almost surely, 2^{1220110121211} is an apocalyptic number.

1220110121211 is a deficient number, since it is larger than the sum of its proper divisors (535818782469).

1220110121211 is a wasteful number, since it uses less digits than its factorization.

1220110121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456.

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

Adding to 1220110121211 its reverse (1121210110221), we get a palindrome (2341320231432).

The spelling of 1220110121211 in words is "one trillion, two hundred twenty billion, one hundred ten million, one hundred twenty-one thousand, two hundred eleven".