101221212100101 has 16 divisors (see below), whose sum is σ = 137544333693888. Its totient is φ = 66197807596800.

The previous prime is 101221212100091. The next prime is 101221212100109. The reversal of 101221212100101 is 101001212122101.

It is a happy number.

It is not a de Polignac number, because 101221212100101 - 2⁴⁵ = 66036840011269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221212100109) 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, 1044740190 + ... + 1044837071.

It is an arithmetic number, because the mean of its divisors is an integer number (8596520855868).

Almost surely, 2^{101221212100101} is an apocalyptic number.

It is an amenable number.

101221212100101 is a deficient number, since it is larger than the sum of its proper divisors (36323121593787).

101221212100101 is a wasteful number, since it uses less digits than its factorization.

101221212100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2089577572.

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

Adding to 101221212100101 its reverse (101001212122101), we get a palindrome (202222424222202).

The spelling of 101221212100101 in words is "one hundred one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred thousand, one hundred one".