21212020011102 has 96 divisors (see below), whose sum is σ = 45390517316352. Its totient is φ = 6607050894336.

The previous prime is 21212020011067. The next prime is 21212020011103. The reversal of 21212020011102 is 20111002021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212020011103) 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, 140119983 + ... + 140271285.

It is an arithmetic number, because the mean of its divisors is an integer number (472817888712).

Almost surely, 2^{21212020011102} is an apocalyptic number.

21212020011102 is an abundant number, since it is smaller than the sum of its proper divisors (24178497305250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21212020011102 is a wasteful number, since it uses less digits than its factorization.

21212020011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151922 (or 151905 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212020011102 its reverse (20111002021212), we get a palindrome (41323022032314).

The spelling of 21212020011102 in words is "twenty-one trillion, two hundred twelve billion, twenty million, eleven thousand, one hundred two".