1220022021020 has 72 divisors (see below), whose sum is σ = 2881625196912. Its totient is φ = 433327023360.

The previous prime is 1220022021017. The next prime is 1220022021047. The reversal of 1220022021020 is 201202200221.

It is a junction number, because it is equal to n+sod(n) for n = 1220022020986 and 1220022021004.

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, 5758049 + ... + 5966168.

Almost surely, 2^{1220022021020} is an apocalyptic number.

1220022021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220022021020 is an abundant number, since it is smaller than the sum of its proper divisors (1661603175892).

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

1220022021020 is a wasteful number, since it uses less digits than its factorization.

1220022021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724291 (or 11724278 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 1220022021020 its reverse (201202200221), we get a palindrome (1421224221241).

The spelling of 1220022021020 in words is "one trillion, two hundred twenty billion, twenty-two million, twenty-one thousand, twenty".