101220202221121 has 4 divisors (see below), whose sum is σ = 102263709460612. Its totient is φ = 100176694981632.

The previous prime is 101220202221119. The next prime is 101220202221163. The reversal of 101220202221121 is 121122202022101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65071068088896 + 36149134132225 = 8066664^2 + 6012415^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220202221121 - 2¹ = 101220202221119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101220202221421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521753619600 + ... + 521753619793.

It is an arithmetic number, because the mean of its divisors is an integer number (25565927365153).

Almost surely, 2^{101220202221121} is an apocalyptic number.

It is an amenable number.

101220202221121 is a deficient number, since it is larger than the sum of its proper divisors (1043507239491).

101220202221121 is an equidigital number, since it uses as much as digits as its factorization.

101220202221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043507239490.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 101220202221121 its reverse (121122202022101), we get a palindrome (222342404243222).

The spelling of 101220202221121 in words is "one hundred one trillion, two hundred twenty billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".