402120100202 has 16 divisors (see below), whose sum is σ = 618011137800. Its totient is φ = 196118280960.

The previous prime is 402120100201. The next prime is 402120100241. The reversal of 402120100202 is 202001021204.

It can be written as a sum of positive squares in 4 ways, for example, as 401995308961 + 124791241 = 634031^2 + 11171^2 .

It is not an unprimeable number, because it can be changed into a prime (402120100201) 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 in 7 ways as a sum of consecutive naturals, for example, 43577 + ... + 897852.

Almost surely, 2^402120100202 is an apocalyptic number.

402120100202 is a deficient number, since it is larger than the sum of its proper divisors (215891037598).

402120100202 is a wasteful number, since it uses less digits than its factorization.

402120100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946681.

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

Adding to 402120100202 its reverse (202001021204), we get a palindrome (604121121406).

The spelling of 402120100202 in words is "four hundred two billion, one hundred twenty million, one hundred thousand, two hundred two".