21220100000402 has 8 divisors (see below), whose sum is σ = 31830184632396. Its totient is φ = 10610038456272.

The previous prime is 21220100000383. The next prime is 21220100000413. The reversal of 21220100000402 is 20400000102212.

It can be written as a sum of positive squares in 2 ways, for example, as 19236478455481 + 1983621544921 = 4385941^2 + 1408411^2 .

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, 3254633 + ... + 7282364.

Almost surely, 2^{21220100000402} is an apocalyptic number.

21220100000402 is a deficient number, since it is larger than the sum of its proper divisors (10610084631994).

21220100000402 is a wasteful number, since it uses less digits than its factorization.

21220100000402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11543932.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21220100000402 its reverse (20400000102212), we get a palindrome (41620100102614).

The spelling of 21220100000402 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, four hundred two", and thus it is an aban number.