101211001201221 has 16 divisors (see below), whose sum is σ = 139740598829568. Its totient is φ = 65091434558400.

The previous prime is 101211001201217. The next prime is 101211001201237. The reversal of 101211001201221 is 122102100112101.

It is a happy number.

It is not a de Polignac number, because 101211001201221 - 2² = 101211001201217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101211001201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211001201421) 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, 1716516790 + ... + 1716575751.

It is an arithmetic number, because the mean of its divisors is an integer number (8733787426848).

Almost surely, 2^{101211001201221} is an apocalyptic number.

It is an amenable number.

101211001201221 is a deficient number, since it is larger than the sum of its proper divisors (38529597628347).

101211001201221 is a wasteful number, since it uses less digits than its factorization.

101211001201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3433092892.

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

Adding to 101211001201221 its reverse (122102100112101), we get a palindrome (223313101313322).

The spelling of 101211001201221 in words is "one hundred one trillion, two hundred eleven billion, one million, two hundred one thousand, two hundred twenty-one".