1220012121222 has 48 divisors (see below), whose sum is σ = 2649251543328. Its totient is φ = 405765158400.

The previous prime is 1220012121217. The next prime is 1220012121347. The reversal of 1220012121222 is 2221212100221.

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 = 1220012121195 and 1220012121204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16595847 + ... + 16669197.

It is an arithmetic number, because the mean of its divisors is an integer number (55192740486).

Almost surely, 2^{1220012121222} is an apocalyptic number.

1220012121222 is an abundant number, since it is smaller than the sum of its proper divisors (1429239422106).

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

1220012121222 is a wasteful number, since it uses less digits than its factorization.

1220012121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75405 (or 75402 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1220012121222 its reverse (2221212100221), we get a palindrome (3441224221443).

The spelling of 1220012121222 in words is "one trillion, two hundred twenty billion, twelve million, one hundred twenty-one thousand, two hundred twenty-two".