20212021122011 has 16 divisors (see below), whose sum is σ = 21293533954560. Its totient is φ = 19132282762560.

The previous prime is 20212021121947. The next prime is 20212021122017. The reversal of 20212021122011 is 11022112021202.

It is a cyclic number.

It is not a de Polignac number, because 20212021122011 - 2⁶ = 20212021121947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212021122017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482055530 + ... + 482097456.

It is an arithmetic number, because the mean of its divisors is an integer number (1330845872160).

Almost surely, 2^{20212021122011} is an apocalyptic number.

20212021122011 is a deficient number, since it is larger than the sum of its proper divisors (1081512832549).

20212021122011 is a wasteful number, since it uses less digits than its factorization.

20212021122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62474.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212021122011 its reverse (11022112021202), we get a palindrome (31234133143213).

The spelling of 20212021122011 in words is "twenty trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, eleven".