1220102012111 has 4 divisors (see below), whose sum is σ = 1229007866352. Its totient is φ = 1211196157872.

The previous prime is 1220102012099. The next prime is 1220102012119. The reversal of 1220102012111 is 1112102010221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1220102012111 - 2¹⁰ = 1220102011087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220102012119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4452926915 + ... + 4452927188.

It is an arithmetic number, because the mean of its divisors is an integer number (307251966588).

Almost surely, 2^{1220102012111} is an apocalyptic number.

1220102012111 is a deficient number, since it is larger than the sum of its proper divisors (8905854241).

1220102012111 is an equidigital number, since it uses as much as digits as its factorization.

1220102012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8905854240.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1220102012111 its reverse (1112102010221), we get a palindrome (2332204022332).

The spelling of 1220102012111 in words is "one trillion, two hundred twenty billion, one hundred two million, twelve thousand, one hundred eleven".