21020111102012 has 48 divisors (see below), whose sum is σ = 42242401756800. Its totient is φ = 9051501735360.

The previous prime is 21020111101991. The next prime is 21020111102017.

21020111102012 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020111102017) 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, 36657503 + ... + 37226505.

It is an arithmetic number, because the mean of its divisors is an integer number (880050036600).

Almost surely, 2^{21020111102012} is an apocalyptic number.

21020111102012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21020111102012 is an abundant number, since it is smaller than the sum of its proper divisors (21222290654788).

21020111102012 is a wasteful number, since it uses less digits than its factorization.

21020111102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613226 (or 613224 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 2102011 and 1102012, that added together give a palindrome (3204023).

The spelling of 21020111102012 in words is "twenty-one trillion, twenty billion, one hundred eleven million, one hundred two thousand, twelve".