220001102022121 has 4 divisors (see below), whose sum is σ = 251429830882432. Its totient is φ = 188572373161812.

The previous prime is 220001102022109. The next prime is 220001102022257. The reversal of 220001102022121 is 121220201100022.

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 220001102022121 - 2⁹ = 220001102021609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220001102022095 and 220001102022104.

It is not an unprimeable number, because it can be changed into a prime (220001102022101) 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, 15714364430145 + ... + 15714364430158.

It is an arithmetic number, because the mean of its divisors is an integer number (62857457720608).

Almost surely, 2^{220001102022121} is an apocalyptic number.

It is an amenable number.

220001102022121 is a deficient number, since it is larger than the sum of its proper divisors (31428728860311).

220001102022121 is an equidigital number, since it uses as much as digits as its factorization.

220001102022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31428728860310.

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

Adding to 220001102022121 its reverse (121220201100022), we get a palindrome (341221303122143).

The spelling of 220001102022121 in words is "two hundred twenty trillion, one billion, one hundred two million, twenty-two thousand, one hundred twenty-one".