210221012100202 has 4 divisors (see below), whose sum is σ = 315331518150306. Its totient is φ = 105110506050100.

The previous prime is 210221012100167. The next prime is 210221012100227. The reversal of 210221012100202 is 202001210122012.

It is a happy number.

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., 135104799124681 + 75116212975521 = 11623459^2 + 8666961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52555253025049 + ... + 52555253025052.

Almost surely, 2^{210221012100202} is an apocalyptic number.

210221012100202 is a deficient number, since it is larger than the sum of its proper divisors (105110506050104).

210221012100202 is a wasteful number, since it uses less digits than its factorization.

210221012100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105110506050103.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210221012100202 its reverse (202001210122012), we get a palindrome (412222222222214).

The spelling of 210221012100202 in words is "two hundred ten trillion, two hundred twenty-one billion, twelve million, one hundred thousand, two hundred two".