101221121022121 has 4 divisors (see below), whose sum is σ = 101221367723392. Its totient is φ = 101220874320852.

The previous prime is 101221121022113. The next prime is 101221121022221. The reversal of 101221121022121 is 121220121122101.

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 101221121022121 - 2³ = 101221121022113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221121022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122734161 + ... + 123556126.

It is an arithmetic number, because the mean of its divisors is an integer number (25305341930848).

Almost surely, 2^{101221121022121} is an apocalyptic number.

It is an amenable number.

101221121022121 is a deficient number, since it is larger than the sum of its proper divisors (246701271).

101221121022121 is an equidigital number, since it uses as much as digits as its factorization.

101221121022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246701270.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 101221121022121 its reverse (121220121122101), we get a palindrome (222441242144222).

The spelling of 101221121022121 in words is "one hundred one trillion, two hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred twenty-one".