10211220100121 has 4 divisors (see below), whose sum is σ = 10233370252644. Its totient is φ = 10189069947600.

The previous prime is 10211220099961. The next prime is 10211220100189. The reversal of 10211220100121 is 12100102211201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3107502621721 + 7103717478400 = 1762811^2 + 2665280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10211220100121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10211220100096 and 10211220100105.

It is not an unprimeable number, because it can be changed into a prime (10211220100621) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11075075570 + ... + 11075076491.

It is an arithmetic number, because the mean of its divisors is an integer number (2558342563161).

Almost surely, 2^{10211220100121} is an apocalyptic number.

It is an amenable number.

10211220100121 is a deficient number, since it is larger than the sum of its proper divisors (22150152523).

10211220100121 is an equidigital number, since it uses as much as digits as its factorization.

10211220100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22150152522.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10211220100121 its reverse (12100102211201), we get a palindrome (22311322311322).

The spelling of 10211220100121 in words is "ten trillion, two hundred eleven billion, two hundred twenty million, one hundred thousand, one hundred twenty-one".