20112211101021 has 16 divisors (see below), whose sum is σ = 28879189893120. Its totient is φ = 12376694917440.

The previous prime is 20112211101019. The next prime is 20112211101023. The reversal of 20112211101021 is 12010111221102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20112211101019) and next prime (20112211101023).

It is not a de Polignac number, because 20112211101021 - 2¹ = 20112211101019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112211101023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10174791 + ... + 11989611.

It is an arithmetic number, because the mean of its divisors is an integer number (1804949368320).

Almost surely, 2^{20112211101021} is an apocalyptic number.

It is an amenable number.

20112211101021 is a deficient number, since it is larger than the sum of its proper divisors (8766978792099).

20112211101021 is a wasteful number, since it uses less digits than its factorization.

20112211101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098996.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20112211101021 its reverse (12010111221102), we get a palindrome (32122322322123).

The spelling of 20112211101021 in words is "twenty trillion, one hundred twelve billion, two hundred eleven million, one hundred one thousand, twenty-one".