1221420214322 has 128 divisors (see below), whose sum is σ = 2445863454720. Its totient is φ = 443076480000.

The previous prime is 1221420214319. The next prime is 1221420214327. The reversal of 1221420214322 is 2234120241221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221420214291 and 1221420214300.

It is not an unprimeable number, because it can be changed into a prime (1221420214327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 317167697 + ... + 317171547.

It is an arithmetic number, because the mean of its divisors is an integer number (19108308240).

Almost surely, 2^{1221420214322} is an apocalyptic number.

1221420214322 is an abundant number, since it is smaller than the sum of its proper divisors (1224443240398).

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

1221420214322 is a wasteful number, since it uses less digits than its factorization.

1221420214322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1221420214322 its reverse (2234120241221), we get a palindrome (3455540455543).

The spelling of 1221420214322 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, two hundred fourteen thousand, three hundred twenty-two".