21112020012212 has 6 divisors (see below), whose sum is σ = 36946035021378. Its totient is φ = 10556010006104.

The previous prime is 21112020012199. The next prime is 21112020012277. The reversal of 21112020012212 is 21221002021112.

It can be written as a sum of positive squares in only one way, i.e., 18994308196516 + 2117711815696 = 4358246^2 + 1455236^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639002501523 + ... + 2639002501530.

It is an arithmetic number, because the mean of its divisors is an integer number (6157672503563).

Almost surely, 2^{21112020012212} is an apocalyptic number.

It is an amenable number.

21112020012212 is a deficient number, since it is larger than the sum of its proper divisors (15834015009166).

21112020012212 is a wasteful number, since it uses less digits than its factorization.

21112020012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278005003057 (or 5278005003055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112020012212 its reverse (21221002021112), we get a palindrome (42333022033324).

The spelling of 21112020012212 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twelve thousand, two hundred twelve".