122121221021021 has 4 divisors (see below), whose sum is σ = 122124265642944. Its totient is φ = 122118176399100.

The previous prime is 122121221020979. The next prime is 122121221021119. The reversal of 122121221021021 is 120120122121221.

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 122121221021021 - 2¹⁴ = 122121221004637 is a prime.

It is a super-2 number, since 2×122121221021021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122121221020984 and 122121221021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121221051021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522250795 + ... + 1522331016.

It is an arithmetic number, because the mean of its divisors is an integer number (30531066410736).

Almost surely, 2^{122121221021021} is an apocalyptic number.

It is an amenable number.

122121221021021 is a deficient number, since it is larger than the sum of its proper divisors (3044621923).

122121221021021 is an equidigital number, since it uses as much as digits as its factorization.

122121221021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044621922.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122121221021021 its reverse (120120122121221), we get a palindrome (242241343142242).

The spelling of 122121221021021 in words is "one hundred twenty-two trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty-one thousand, twenty-one".