10211202101221 has 4 divisors (see below), whose sum is σ = 11139493201344. Its totient is φ = 9282911001100.

The previous prime is 10211202101209. The next prime is 10211202101249. The reversal of 10211202101221 is 12210120211201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10211202101221 - 2¹¹ = 10211202099173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211202101195 and 10211202101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10211202102221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464145550045 + ... + 464145550066.

It is an arithmetic number, because the mean of its divisors is an integer number (2784873300336).

Almost surely, 2^{10211202101221} is an apocalyptic number.

10211202101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10211202101221 is a deficient number, since it is larger than the sum of its proper divisors (928291100123).

10211202101221 is an equidigital number, since it uses as much as digits as its factorization.

10211202101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928291100122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10211202101221 its reverse (12210120211201), we get a palindrome (22421322312422).

The spelling of 10211202101221 in words is "ten trillion, two hundred eleven billion, two hundred two million, one hundred one thousand, two hundred twenty-one".