10021012111 has 4 divisors (see below), whose sum is σ = 10932013224. Its totient is φ = 9110011000.

The previous prime is 10021012109. The next prime is 10021012121. The reversal of 10021012111 is 11121012001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11121012001 = 11 ⋅1011001091.

It is a cyclic number.

It is not a de Polignac number, because 10021012111 - 2¹ = 10021012109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021012121) 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, 455500540 + ... + 455500561.

It is an arithmetic number, because the mean of its divisors is an integer number (2733003306).

Almost surely, 2^10021012111 is an apocalyptic number.

10021012111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

10021012111 is a deficient number, since it is larger than the sum of its proper divisors (911001113).

10021012111 is an equidigital number, since it uses as much as digits as its factorization.

10021012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911001112.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10021012111 its reverse (11121012001), we get a palindrome (21142024112).

The spelling of 10021012111 in words is "ten billion, twenty-one million, twelve thousand, one hundred eleven".