21112020012111 has 8 divisors (see below), whose sum is σ = 32170697161344. Its totient is φ = 12064011435480.

The previous prime is 21112020012107. The next prime is 21112020012121. The reversal of 21112020012111 is 11121002021112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21112020012111 - 2² = 21112020012107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112020012121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502667143125 + ... + 502667143166.

It is an arithmetic number, because the mean of its divisors is an integer number (4021337145168).

Almost surely, 2^{21112020012111} is an apocalyptic number.

21112020012111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21112020012111 is a deficient number, since it is larger than the sum of its proper divisors (11058677149233).

21112020012111 is a wasteful number, since it uses less digits than its factorization.

21112020012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005334286301.

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

Adding to 21112020012111 its reverse (11121002021112), we get a palindrome (32233022033223).

The spelling of 21112020012111 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twelve thousand, one hundred eleven".