21101102020212 has 24 divisors (see below), whose sum is σ = 49485833169696. Its totient is φ = 6997996608288.

The previous prime is 21101102020211. The next prime is 21101102020217. The reversal of 21101102020212 is 21202020110112.

It is a junction number, because it is equal to n+sod(n) for n = 21101102020191 and 21101102020200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101102020211) 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, 4463005678 + ... + 4463010405.

It is an arithmetic number, because the mean of its divisors is an integer number (2061909715404).

Almost surely, 2^{21101102020212} is an apocalyptic number.

It is an amenable number.

21101102020212 is an abundant number, since it is smaller than the sum of its proper divisors (28384731149484).

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

21101102020212 is a wasteful number, since it uses less digits than its factorization.

21101102020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926016287 (or 8926016285 counting only the distinct ones).

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

Adding to 21101102020212 its reverse (21202020110112), we get a palindrome (42303122130324).

The spelling of 21101102020212 in words is "twenty-one trillion, one hundred one billion, one hundred two million, twenty thousand, two hundred twelve".