2102221210202 has 4 divisors (see below), whose sum is σ = 3153331815306. Its totient is φ = 1051110605100.

The previous prime is 2102221210147. The next prime is 2102221210231. The reversal of 2102221210202 is 2020121222012.

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., 1256706018841 + 845515191361 = 1121029^2 + 919519^2 .

It is a super-2 number, since 2×2102221210202² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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, 525555302549 + ... + 525555302552.

Almost surely, 2^{2102221210202} is an apocalyptic number.

2102221210202 is a deficient number, since it is larger than the sum of its proper divisors (1051110605104).

2102221210202 is a wasteful number, since it uses less digits than its factorization.

2102221210202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051110605103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2102221210202 its reverse (2020121222012), we get a palindrome (4122342432214).

The spelling of 2102221210202 in words is "two trillion, one hundred two billion, two hundred twenty-one million, two hundred ten thousand, two hundred two".