101210221121 has 4 divisors (see below), whose sum is σ = 101889484500. Its totient is φ = 100530957744.

The previous prime is 101210221111. The next prime is 101210221127. The reversal of 101210221121 is 121122012101.

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 61075708225 + 40134512896 = 247135^2 + 200336^2 .

It is a cyclic number.

It is not a de Polignac number, because 101210221121 - 2¹⁴ = 101210204737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101210221096 and 101210221105.

It is not an unprimeable number, because it can be changed into a prime (101210221127) 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, 339631466 + ... + 339631763.

It is an arithmetic number, because the mean of its divisors is an integer number (25472371125).

Almost surely, 2^101210221121 is an apocalyptic number.

It is an amenable number.

101210221121 is a deficient number, since it is larger than the sum of its proper divisors (679263379).

101210221121 is an equidigital number, since it uses as much as digits as its factorization.

101210221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679263378.

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

Adding to 101210221121 its reverse (121122012101), we get a palindrome (222332233222).

The spelling of 101210221121 in words is "one hundred one billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".