21012211122002 has 8 divisors (see below), whose sum is σ = 31519710564876. Its totient is φ = 10505640933712.

The previous prime is 21012211121999. The next prime is 21012211122011. The reversal of 21012211122002 is 20022111221012.

It can be written as a sum of positive squares in 2 ways, for example, as 19584351027241 + 1427860094761 = 4425421^2 + 1194931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 232257113 + ... + 232347564.

Almost surely, 2^{21012211122002} is an apocalyptic number.

21012211122002 is a deficient number, since it is larger than the sum of its proper divisors (10507499442874).

21012211122002 is a wasteful number, since it uses less digits than its factorization.

21012211122002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464627292.

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

Adding to 21012211122002 its reverse (20022111221012), we get a palindrome (41034322343014).

It can be divided in two parts, 2101221 and 1122002, that added together give a palindrome (3223223).

The spelling of 21012211122002 in words is "twenty-one trillion, twelve billion, two hundred eleven million, one hundred twenty-two thousand, two".