1021142111 has 24 divisors (see below), whose sum is σ = 1202956272. Its totient is φ = 863033600.

The previous prime is 1021142107. The next prime is 1021142117. The reversal of 1021142111 is 1112411201.

It is not a de Polignac number, because 1021142111 - 2² = 1021142107 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 (1021142117) 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 23 ways as a sum of consecutive naturals, for example, 167741 + ... + 173721.

It is an arithmetic number, because the mean of its divisors is an integer number (50123178).

Almost surely, 2^1021142111 is an apocalyptic number.

1021142111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021142111 is a deficient number, since it is larger than the sum of its proper divisors (181814161).

1021142111 is a wasteful number, since it uses less digits than its factorization.

1021142111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103 (or 6092 counting only the distinct ones).

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

The square root of 1021142111 is about 31955.3142841688. The cubic root of 1021142111 is about 1006.9982801591.

Adding to 1021142111 its reverse (1112411201), we get a palindrome (2133553312).

The spelling of 1021142111 in words is "one billion, twenty-one million, one hundred forty-two thousand, one hundred eleven".