1221101422 has 4 divisors (see below), whose sum is σ = 1831652136. Its totient is φ = 610550710.

The previous prime is 1221101389. The next prime is 1221101423. The reversal of 1221101422 is 2241011221.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1221101396 and 1221101405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305275354 + ... + 305275357.

It is an arithmetic number, because the mean of its divisors is an integer number (457913034).

Almost surely, 2^1221101422 is an apocalyptic number.

1221101422 is a deficient number, since it is larger than the sum of its proper divisors (610550714).

1221101422 is an equidigital number, since it uses as much as digits as its factorization.

1221101422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610550713.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1221101422 is about 34944.2616462274. The cubic root of 1221101422 is about 1068.8511913945.

Adding to 1221101422 its reverse (2241011221), we get a palindrome (3462112643).

The spelling of 1221101422 in words is "one billion, two hundred twenty-one million, one hundred one thousand, four hundred twenty-two".