121213422 has 80 divisors (see below), whose sum is σ = 298577664. Its totient is φ = 36450000.

The previous prime is 121213409. The next prime is 121213429. The reversal of 121213422 is 224312121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121213395 and 121213404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213429) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 447147 + ... + 447417.

Almost surely, 2^121213422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121213422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149288832).

121213422 is an abundant number, since it is smaller than the sum of its proper divisors (177364242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121213422 is a wasteful number, since it uses less digits than its factorization.

121213422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 538 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 121213422 is about 11009.6967260683. The cubic root of 121213422 is about 494.8993734848.

Adding to 121213422 its reverse (224312121), we get a palindrome (345525543).

The spelling of 121213422 in words is "one hundred twenty-one million, two hundred thirteen thousand, four hundred twenty-two".