101210100021221 has 16 divisors (see below), whose sum is σ = 103310666319168. Its totient is φ = 99124439990400.

The previous prime is 101210100021179. The next prime is 101210100021227. The reversal of 101210100021221 is 122120001012101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101210100021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101210100021196 and 101210100021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210100021227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15400961 + ... + 20966873.

It is an arithmetic number, because the mean of its divisors is an integer number (6456916644948).

Almost surely, 2^{101210100021221} is an apocalyptic number.

It is an amenable number.

101210100021221 is a deficient number, since it is larger than the sum of its proper divisors (2100566297947).

101210100021221 is an equidigital number, since it uses as much as digits as its factorization.

101210100021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567252.

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

Adding to 101210100021221 its reverse (122120001012101), we get a palindrome (223330101033322).

The spelling of 101210100021221 in words is "one hundred one trillion, two hundred ten billion, one hundred million, twenty-one thousand, two hundred twenty-one".