204120202021402 has 4 divisors (see below), whose sum is σ = 306180303032106. Its totient is φ = 102060101010700.

The previous prime is 204120202021399. The next prime is 204120202021409.

204120202021402 is nontrivially palindromic in base 10.

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., 124187643890401 + 79932558131001 = 11143951^2 + 8940501^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (204120202021409) by changing a digit.

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 as a sum of consecutive naturals, namely, 51030050505349 + ... + 51030050505352.

Almost surely, 2^{204120202021402} is an apocalyptic number.

204120202021402 is a deficient number, since it is larger than the sum of its proper divisors (102060101010704).

204120202021402 is a wasteful number, since it uses less digits than its factorization.

204120202021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102060101010703.

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

It can be divided in two parts, 20412020 and 2021402, that added together give a palindrome (22433422).

The spelling of 204120202021402 in words is "two hundred four trillion, one hundred twenty billion, two hundred two million, twenty-one thousand, four hundred two".