101222220121 has 4 divisors (see below), whose sum is σ = 110424240144. Its totient is φ = 92020200100.

The previous prime is 101222220101. The next prime is 101222220133. The reversal of 101222220121 is 121022222101.

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 a de Polignac number, because none of the positive numbers 2^k-101222220121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101222220095 and 101222220104.

It is not an unprimeable number, because it can be changed into a prime (101222220101) 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, 4601009995 + ... + 4601010016.

It is an arithmetic number, because the mean of its divisors is an integer number (27606060036).

Almost surely, 2^101222220121 is an apocalyptic number.

101222220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101222220121 is a deficient number, since it is larger than the sum of its proper divisors (9202020023).

101222220121 is an equidigital number, since it uses as much as digits as its factorization.

101222220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9202020022.

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

Adding to 101222220121 its reverse (121022222101), we get a palindrome (222244442222).

The spelling of 101222220121 in words is "one hundred one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".