20111301210021 has 16 divisors (see below), whose sum is σ = 30651040972800. Its totient is φ = 11490203875248.

The previous prime is 20111301210019. The next prime is 20111301210023. The reversal of 20111301210021 is 12001210311102.

It is an interprime number because it is at equal distance from previous prime (20111301210019) and next prime (20111301210023).

It is not a de Polignac number, because 20111301210021 - 2¹ = 20111301210019 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 (20111301210023) 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, 81884661 + ... + 82129898.

It is an arithmetic number, because the mean of its divisors is an integer number (1915690060800).

Almost surely, 2^{20111301210021} is an apocalyptic number.

20111301210021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20111301210021 is a deficient number, since it is larger than the sum of its proper divisors (10539739762779).

20111301210021 is a wasteful number, since it uses less digits than its factorization.

20111301210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164020408.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20111301210021 its reverse (12001210311102), we get a palindrome (32112511521123).

The spelling of 20111301210021 in words is "twenty trillion, one hundred eleven billion, three hundred one million, two hundred ten thousand, twenty-one".