2021012112011 has 4 divisors (see below), whose sum is σ = 2041022133024. Its totient is φ = 2001002091000.

The previous prime is 2021012111999. The next prime is 2021012112071. The reversal of 2021012112011 is 1102112101202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021012112011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021012112071) 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, 10005010355 + ... + 10005010556.

It is an arithmetic number, because the mean of its divisors is an integer number (510255533256).

Almost surely, 2^{2021012112011} is an apocalyptic number.

2021012112011 is a deficient number, since it is larger than the sum of its proper divisors (20010021013).

2021012112011 is a wasteful number, since it uses less digits than its factorization.

2021012112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20010021012.

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

Adding to 2021012112011 its reverse (1102112101202), we get a palindrome (3123124213213).

The spelling of 2021012112011 in words is "two trillion, twenty-one billion, twelve million, one hundred twelve thousand, eleven".