121021224421 has 8 divisors (see below), whose sum is σ = 123989330304. Its totient is φ = 118053898080.

The previous prime is 121021224419. The next prime is 121021224427. The reversal of 121021224421 is 124422120121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121021224421 - 2¹ = 121021224419 is a prime.

It is a super-2 number, since 2×121021224421² (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 = 121021224392 and 121021224401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021224427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125806 + ... + 507808.

It is an arithmetic number, because the mean of its divisors is an integer number (15498666288).

Almost surely, 2^121021224421 is an apocalyptic number.

It is an amenable number.

121021224421 is a deficient number, since it is larger than the sum of its proper divisors (2968105883).

121021224421 is an equidigital number, since it uses as much as digits as its factorization.

121021224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389771.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121021224421 its reverse (124422120121), we get a palindrome (245443344542).

The spelling of 121021224421 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-four thousand, four hundred twenty-one".