202121220002 has 8 divisors (see below), whose sum is σ = 326503509276. Its totient is φ = 93286716912.

The previous prime is 202121219999. The next prime is 202121220011. The reversal of 202121220002 is 200022121202.

It can be written as a sum of positive squares in 2 ways, for example, as 153892228681 + 48228991321 = 392291^2 + 219611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886946513 + ... + 3886946564.

Almost surely, 2^202121220002 is an apocalyptic number.

202121220002 is a deficient number, since it is larger than the sum of its proper divisors (124382289274).

202121220002 is a wasteful number, since it uses less digits than its factorization.

202121220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773893092.

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

Adding to 202121220002 its reverse (200022121202), we get a palindrome (402143341204).

The spelling of 202121220002 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, two".