21000100300402 has 4 divisors (see below), whose sum is σ = 31500150450606. Its totient is φ = 10500050150200.

The previous prime is 21000100300391. The next prime is 21000100300409. The reversal of 21000100300402 is 20400300100012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13379800781281 + 7620299519121 = 3657841^2 + 2760489^2 .

It is not an unprimeable number, because it can be changed into a prime (21000100300409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250025075099 + ... + 5250025075102.

Almost surely, 2^{21000100300402} is an apocalyptic number.

21000100300402 is a deficient number, since it is larger than the sum of its proper divisors (10500050150204).

21000100300402 is a wasteful number, since it uses less digits than its factorization.

21000100300402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500050150203.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21000100300402 its reverse (20400300100012), we get a palindrome (41400400400414).

The spelling of 21000100300402 in words is "twenty-one trillion, one hundred million, three hundred thousand, four hundred two".