101210101021221 has 16 divisors (see below), whose sum is σ = 134995336862400. Its totient is φ = 67449135104000.

The previous prime is 101210101021201. The next prime is 101210101021273. The reversal of 101210101021221 is 122120101012101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101210101021221 - 2²³ = 101210092632613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101210101021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210101021201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194302501 + ... + 194822693.

It is an arithmetic number, because the mean of its divisors is an integer number (8437208553900).

Almost surely, 2^{101210101021221} is an apocalyptic number.

It is an amenable number.

101210101021221 is a deficient number, since it is larger than the sum of its proper divisors (33785235841179).

101210101021221 is a wasteful number, since it uses less digits than its factorization.

101210101021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543396.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 101210101021221 its reverse (122120101012101), we get a palindrome (223330202033322).

The spelling of 101210101021221 in words is "one hundred one trillion, two hundred ten billion, one hundred one million, twenty-one thousand, two hundred twenty-one".