21112302212 has 12 divisors (see below), whose sum is σ = 36962657676. Its totient is φ = 10551542880.

The previous prime is 21112302173. The next prime is 21112302283. The reversal of 21112302212 is 21220321112.

It can be written as a sum of positive squares in 2 ways, for example, as 5040148036 + 16072154176 = 70994^2 + 126776^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141739 + ... + 1160082.

It is an arithmetic number, because the mean of its divisors is an integer number (3080221473).

Almost surely, 2^21112302212 is an apocalyptic number.

It is an amenable number.

21112302212 is a deficient number, since it is larger than the sum of its proper divisors (15850355464).

21112302212 is a wasteful number, since it uses less digits than its factorization.

21112302212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304118 (or 2304116 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21112302212 its reverse (21220321112), we get a palindrome (42332623324).

The spelling of 21112302212 in words is "twenty-one billion, one hundred twelve million, three hundred two thousand, two hundred twelve".