21202000122112 has 18 divisors (see below), whose sum is σ = 42321179931758. Its totient is φ = 10601000060928.

The previous prime is 21202000122089. The next prime is 21202000122151. The reversal of 21202000122112 is 21122100020212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21020537753856 + 181462368256 = 4584816^2 + 425984^2 .

It is a super-2 number, since 2×21202000122112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41410156233 + ... + 41410156744.

Almost surely, 2^{21202000122112} is an apocalyptic number.

It is an amenable number.

21202000122112 is a deficient number, since it is larger than the sum of its proper divisors (21119179809646).

21202000122112 is an frugal number, since it uses more digits than its factorization.

21202000122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82820312993 (or 82820312979 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202000122112 its reverse (21122100020212), we get a palindrome (42324100142324).

The spelling of 21202000122112 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-two thousand, one hundred twelve".