101020121101221 has 16 divisors (see below), whose sum is σ = 153940305673728. Its totient is φ = 57723952345200.

The previous prime is 101020121101219. The next prime is 101020121101223. The reversal of 101020121101221 is 122101121020101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101020121101219) and next prime (101020121101223).

It is not a de Polignac number, because 101020121101221 - 2¹ = 101020121101219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101020121101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101020121101223) 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, 75619635 + ... + 76943936.

It is an arithmetic number, because the mean of its divisors is an integer number (9621269104608).

Almost surely, 2^{101020121101221} is an apocalyptic number.

It is an amenable number.

101020121101221 is a deficient number, since it is larger than the sum of its proper divisors (52920184572507).

101020121101221 is a wasteful number, since it uses less digits than its factorization.

101020121101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152595112.

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

Adding to 101020121101221 its reverse (122101121020101), we get a palindrome (223121242121322).

The spelling of 101020121101221 in words is "one hundred one trillion, twenty billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty-one".