21201111110212 has 24 divisors (see below), whose sum is σ = 40475086045632. Its totient is φ = 9636812124000.

The previous prime is 21201111110191. The next prime is 21201111110219.

21201111110212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21201111110212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21201111110219) 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, 6689433 + ... + 9335455.

It is an arithmetic number, because the mean of its divisors is an integer number (1686461918568).

Almost surely, 2^{21201111110212} is an apocalyptic number.

21201111110212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21201111110212 is a deficient number, since it is larger than the sum of its proper divisors (19273974935420).

21201111110212 is a wasteful number, since it uses less digits than its factorization.

21201111110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828139 (or 2828137 counting only the distinct ones).

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

It can be divided in two parts, 2120111 and 1110212, that added together give a palindrome (3230323).

The spelling of 21201111110212 in words is "twenty-one trillion, two hundred one billion, one hundred eleven million, one hundred ten thousand, two hundred twelve".