101221121122021 has 8 divisors (see below), whose sum is σ = 107176234152384. Its totient is φ = 95266111362240.

The previous prime is 101221121122003. The next prime is 101221121122061. The reversal of 101221121122021 is 120221121122101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101221121122021 - 2¹⁷ = 101221120990949 is a prime.

It is a super-2 number, since 2×101221121122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101221121122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221121122001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23795145 + ... + 27724558.

It is an arithmetic number, because the mean of its divisors is an integer number (13397029269048).

Almost surely, 2^{101221121122021} is an apocalyptic number.

It is an amenable number.

101221121122021 is a deficient number, since it is larger than the sum of its proper divisors (5955113030363).

101221121122021 is a wasteful number, since it uses less digits than its factorization.

101221121122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51635291.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101221121122021 its reverse (120221121122101), we get a palindrome (221442242244122).

The spelling of 101221121122021 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, twenty-one".