1222221013020 has 216 divisors, whose sum is σ = 4314680134128. Its totient is φ = 279236160000.

The previous prime is 1222221012973. The next prime is 1222221013073. The reversal of 1222221013020 is 203101222221.

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 = 1222221012984 and 1222221013002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 19823040 + ... + 19884600.

Almost surely, 2^{1222221013020} is an apocalyptic number.

1222221013020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222221013020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2157340067064).

1222221013020 is an abundant number, since it is smaller than the sum of its proper divisors (3092459121108).

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

1222221013020 is a wasteful number, since it uses less digits than its factorization.

1222221013020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63841 (or 63829 counting only the distinct ones).

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

Adding to 1222221013020 its reverse (203101222221), we get a palindrome (1425322235241).

The spelling of 1222221013020 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, thirteen thousand, twenty".