1220121022 has 4 divisors (see below), whose sum is σ = 1830181536. Its totient is φ = 610060510.

The previous prime is 1220121017. The next prime is 1220121037. The reversal of 1220121022 is 2201210221.

It is a happy number.

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 = 1220120993 and 1220121011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305030254 + ... + 305030257.

It is an arithmetic number, because the mean of its divisors is an integer number (457545384).

Almost surely, 2^1220121022 is an apocalyptic number.

1220121022 is a deficient number, since it is larger than the sum of its proper divisors (610060514).

1220121022 is an equidigital number, since it uses as much as digits as its factorization.

1220121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610060513.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220121022 is about 34930.2307750750. The cubic root of 1220121022 is about 1068.5650611132.

Adding to 1220121022 its reverse (2201210221), we get a palindrome (3421331243).

The spelling of 1220121022 in words is "one billion, two hundred twenty million, one hundred twenty-one thousand, twenty-two".