1022012111 has 4 divisors (see below), whose sum is σ = 1028132112. Its totient is φ = 1015892112.

The previous prime is 1022012059. The next prime is 1022012129. The reversal of 1022012111 is 1112102201.

1022012111 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1112102201 = 7 ⋅158871743.

It is a cyclic number.

It is not a de Polignac number, because 1022012111 - 2¹⁰ = 1022011087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1022012092 and 1022012101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3059750 + ... + 3060083.

It is an arithmetic number, because the mean of its divisors is an integer number (257033028).

Almost surely, 2^1022012111 is an apocalyptic number.

1022012111 is a deficient number, since it is larger than the sum of its proper divisors (6120001).

1022012111 is an equidigital number, since it uses as much as digits as its factorization.

1022012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120000.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1022012111 is about 31968.9241451757. The cubic root of 1022012111 is about 1007.2841821919.

Adding to 1022012111 its reverse (1112102201), we get a palindrome (2134114312).

The spelling of 1022012111 in words is "one billion, twenty-two million, twelve thousand, one hundred eleven".