1020012011 has 4 divisors (see below), whose sum is σ = 1020664512. Its totient is φ = 1019359512.

The previous prime is 1020011999. The next prime is 1020012013. The reversal of 1020012011 is 1102100201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1102100201 = 283 ⋅3894347.

It is a cyclic number.

It is not a de Polignac number, because 1020012011 - 2²² = 1015817707 is a prime.

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 1020012011.

It is not an unprimeable number, because it can be changed into a prime (1020012013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323900 + ... + 327033.

It is an arithmetic number, because the mean of its divisors is an integer number (255166128).

Almost surely, 2^1020012011 is an apocalyptic number.

1020012011 is a deficient number, since it is larger than the sum of its proper divisors (652501).

1020012011 is an equidigital number, since it uses as much as digits as its factorization.

1020012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652500.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1020012011 is about 31937.6268842881. The cubic root of 1020012011 is about 1006.6266607032.

Adding to 1020012011 its reverse (1102100201), we get a palindrome (2122112212).

The spelling of 1020012011 in words is "one billion, twenty million, twelve thousand, eleven".