21022010211111 has 16 divisors (see below), whose sum is σ = 34497657782784. Its totient is φ = 11088532858464.

The previous prime is 21022010211073. The next prime is 21022010211277. The reversal of 21022010211111 is 11111201022012.

It is a happy number.

It is not a de Polignac number, because 21022010211111 - 2¹⁹ = 21022009686823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022010210111) 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, 38501849931 + ... + 38501850476.

It is an arithmetic number, because the mean of its divisors is an integer number (2156103611424).

Almost surely, 2^{21022010211111} is an apocalyptic number.

21022010211111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21022010211111 is a deficient number, since it is larger than the sum of its proper divisors (13475647571673).

21022010211111 is a wasteful number, since it uses less digits than its factorization.

21022010211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77003700430.

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

Adding to 21022010211111 its reverse (11111201022012), we get a palindrome (32133211233123).

The spelling of 21022010211111 in words is "twenty-one trillion, twenty-two billion, ten million, two hundred eleven thousand, one hundred eleven".