21000002022111 has 48 divisors (see below), whose sum is σ = 33432727104000. Its totient is φ = 11683854967680.

The previous prime is 21000002022059. The next prime is 21000002022143. The reversal of 21000002022111 is 11122020000012.

It is not a de Polignac number, because 21000002022111 - 2⁷ = 21000002021983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000002022191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 483831 + ... + 6498776.

It is an arithmetic number, because the mean of its divisors is an integer number (696515148000).

Almost surely, 2^{21000002022111} is an apocalyptic number.

21000002022111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21000002022111 is a deficient number, since it is larger than the sum of its proper divisors (12432725081889).

21000002022111 is a wasteful number, since it uses less digits than its factorization.

21000002022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6983164 (or 6983157 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000002022111 its reverse (11122020000012), we get a palindrome (32122022022123).

The spelling of 21000002022111 in words is "twenty-one trillion, two million, twenty-two thousand, one hundred eleven".