1220112011211 has 32 divisors (see below), whose sum is σ = 1695990001920. Its totient is φ = 779488085376.

The previous prime is 1220112011197. The next prime is 1220112011213. The reversal of 1220112011211 is 1121102110221.

It is a happy number.

It is not a de Polignac number, because 1220112011211 - 2⁶ = 1220112011147 is a prime.

It is a super-4 number, since 4×1220112011211⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1220112011213) 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, 79858305 + ... + 79873581.

It is an arithmetic number, because the mean of its divisors is an integer number (52999687560).

Almost surely, 2^{1220112011211} is an apocalyptic number.

1220112011211 is a deficient number, since it is larger than the sum of its proper divisors (475877990709).

1220112011211 is a wasteful number, since it uses less digits than its factorization.

1220112011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26123.

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

Adding to 1220112011211 its reverse (1121102110221), we get a palindrome (2341214121432).

The spelling of 1220112011211 in words is "one trillion, two hundred twenty billion, one hundred twelve million, eleven thousand, two hundred eleven".