1221122010020 has 48 divisors (see below), whose sum is σ = 2797697060928. Its totient is φ = 444009836160.

The previous prime is 1221122010001. The next prime is 1221122010029. The reversal of 1221122010020 is 200102211221.

It is a super-2 number, since 2×1221122010020² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221122009977 and 1221122010004.

It is not an unprimeable number, because it can be changed into a prime (1221122010029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2709554 + ... + 3127926.

It is an arithmetic number, because the mean of its divisors is an integer number (58285355436).

Almost surely, 2^{1221122010020} is an apocalyptic number.

1221122010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221122010020 is an abundant number, since it is smaller than the sum of its proper divisors (1576575050908).

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

1221122010020 is a wasteful number, since it uses less digits than its factorization.

1221122010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431660 (or 431658 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221122010020 its reverse (200102211221), we get a palindrome (1421224221241).

The spelling of 1221122010020 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, ten thousand, twenty".