101121022002221 has 4 divisors (see below), whose sum is σ = 108899562156252. Its totient is φ = 93342481848192.

The previous prime is 101121022002157. The next prime is 101121022002277. The reversal of 101121022002221 is 122200220121101.

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 49066802752900 + 52054219249321 = 7004770^2 + 7214861^2 .

It is a cyclic number.

It is not a de Polignac number, because 101121022002221 - 2⁶ = 101121022002157 is a prime.

It is a super-2 number, since 2×101121022002221² (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 101121022002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121022005221) 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, 3889270076996 + ... + 3889270077021.

It is an arithmetic number, because the mean of its divisors is an integer number (27224890539063).

Almost surely, 2^{101121022002221} is an apocalyptic number.

It is an amenable number.

101121022002221 is a deficient number, since it is larger than the sum of its proper divisors (7778540154031).

101121022002221 is an equidigital number, since it uses as much as digits as its factorization.

101121022002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778540154030.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 101121022002221 its reverse (122200220121101), we get a palindrome (223321242123322).

The spelling of 101121022002221 in words is "one hundred one trillion, one hundred twenty-one billion, twenty-two million, two thousand, two hundred twenty-one".