220220100210121 has 4 divisors (see below), whose sum is σ = 240240109320144. Its totient is φ = 200200091100100.

The previous prime is 220220100210091. The next prime is 220220100210139. The reversal of 220220100210121 is 121012001022022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220220100210121 - 2⁴⁵ = 185035728121289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220100210095 and 220220100210104.

It is not an unprimeable number, because it can be changed into a prime (220220100210151) 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, 10010004554995 + ... + 10010004555016.

It is an arithmetic number, because the mean of its divisors is an integer number (60060027330036).

Almost surely, 2^{220220100210121} is an apocalyptic number.

It is an amenable number.

220220100210121 is a deficient number, since it is larger than the sum of its proper divisors (20020009110023).

220220100210121 is a wasteful number, since it uses less digits than its factorization.

220220100210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20020009110022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220220100210121 its reverse (121012001022022), we get a palindrome (341232101232143).

The spelling of 220220100210121 in words is "two hundred twenty trillion, two hundred twenty billion, one hundred million, two hundred ten thousand, one hundred twenty-one".