221001210120202 has 4 divisors (see below), whose sum is σ = 331501815180306. Its totient is φ = 110500605060100.

The previous prime is 221001210120143. The next prime is 221001210120283. The reversal of 221001210120202 is 202021012100122.

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., 152494318601881 + 68506891518321 = 12348859^2 + 8276889^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55250302530049 + ... + 55250302530052.

Almost surely, 2^{221001210120202} is an apocalyptic number.

221001210120202 is a deficient number, since it is larger than the sum of its proper divisors (110500605060104).

221001210120202 is a wasteful number, since it uses less digits than its factorization.

221001210120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110500605060103.

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

Adding to 221001210120202 its reverse (202021012100122), we get a palindrome (423022222220324).

The spelling of 221001210120202 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, one hundred twenty thousand, two hundred two".