10202121122221 has 8 divisors (see below), whose sum is σ = 11807156453120. Its totient is φ = 8633983155408.

The previous prime is 10202121122209. The next prime is 10202121122231. The reversal of 10202121122221 is 12222112120201.

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

It is a cyclic number.

It is not a de Polignac number, because 10202121122221 - 2¹⁵ = 10202121089453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121122201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9224340426 + ... + 9224341531.

It is an arithmetic number, because the mean of its divisors is an integer number (1475894556640).

Almost surely, 2^{10202121122221} is an apocalyptic number.

It is an amenable number.

10202121122221 is a deficient number, since it is larger than the sum of its proper divisors (1605035330899).

10202121122221 is an equidigital number, since it uses as much as digits as its factorization.

10202121122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18448682043.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10202121122221 its reverse (12222112120201), we get a palindrome (22424233242422).

The spelling of 10202121122221 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-one".