1012221221111 has 4 divisors (see below), whose sum is σ = 1013785705872. Its totient is φ = 1010656736352.

The previous prime is 1012221221093. The next prime is 1012221221129. The reversal of 1012221221111 is 1111221222101.

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

It is an interprime number because it is at equal distance from previous prime (1012221221093) and next prime (1012221221129).

It is a cyclic number.

It is not a de Polignac number, because 1012221221111 - 2¹⁴ = 1012221204727 is a prime.

It is a super-3 number, since 3×1012221221111³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012221221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012221221411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782241410 + ... + 782242703.

It is an arithmetic number, because the mean of its divisors is an integer number (253446426468).

Almost surely, 2^{1012221221111} is an apocalyptic number.

1012221221111 is a deficient number, since it is larger than the sum of its proper divisors (1564484761).

1012221221111 is an equidigital number, since it uses as much as digits as its factorization.

1012221221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564484760.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1012221221111 its reverse (1111221222101), we get a palindrome (2123442443212).

The spelling of 1012221221111 in words is "one trillion, twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".