20121244402 has 8 divisors (see below), whose sum is σ = 34493561856. Its totient is φ = 8623390452.

The previous prime is 20121244379. The next prime is 20121244433. The reversal of 20121244402 is 20444212102.

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

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 in 3 ways as a sum of consecutive naturals, for example, 718615858 + ... + 718615885.

It is an arithmetic number, because the mean of its divisors is an integer number (4311695232).

Almost surely, 2^20121244402 is an apocalyptic number.

20121244402 is a deficient number, since it is larger than the sum of its proper divisors (14372317454).

20121244402 is a wasteful number, since it uses less digits than its factorization.

20121244402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437231752.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 20121244402 its reverse (20444212102), we get a palindrome (40565456504).

The spelling of 20121244402 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred two".