21120231220202 has 8 divisors (see below), whose sum is σ = 31681104840612. Its totient is φ = 10559862940000.

The previous prime is 21120231220181. The next prime is 21120231220327. The reversal of 21120231220202 is 20202213202112.

It can be written as a sum of positive squares in 2 ways, for example, as 19548344665201 + 1571886555001 = 4421351^2 + 1253749^2 .

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, 126230549 + ... + 126397752.

Almost surely, 2^{21120231220202} is an apocalyptic number.

21120231220202 is a deficient number, since it is larger than the sum of its proper divisors (10560873620410).

21120231220202 is a wasteful number, since it uses less digits than its factorization.

21120231220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252670104.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21120231220202 its reverse (20202213202112), we get a palindrome (41322444422314).

The spelling of 21120231220202 in words is "twenty-one trillion, one hundred twenty billion, two hundred thirty-one million, two hundred twenty thousand, two hundred two".