122121002021 has 4 divisors (see below), whose sum is σ = 128548423200. Its totient is φ = 115693580844.

The previous prime is 122121001913. The next prime is 122121002027. The reversal of 122121002021 is 120200121221.

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 122121002021 - 2²² = 122116807717 is a prime.

It is a super-2 number, since 2×122121002021² (a number of 23 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 = 122121001987 and 122121002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122121002027) 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, 3213710561 + ... + 3213710598.

It is an arithmetic number, because the mean of its divisors is an integer number (32137105800).

Almost surely, 2^122121002021 is an apocalyptic number.

It is an amenable number.

122121002021 is a deficient number, since it is larger than the sum of its proper divisors (6427421179).

122121002021 is an equidigital number, since it uses as much as digits as its factorization.

122121002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6427421178.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 122121002021 its reverse (120200121221), we get a palindrome (242321123242).

The spelling of 122121002021 in words is "one hundred twenty-two billion, one hundred twenty-one million, two thousand, twenty-one".