1221020210300 has 36 divisors (see below), whose sum is σ = 2890487845896. Its totient is φ = 444007348800.

The previous prime is 1221020210279. The next prime is 1221020210309. The reversal of 1221020210300 is 30120201221.

It is a happy number.

It is a super-2 number, since 2×1221020210300² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221020210309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555008087 + ... + 555010286.

Almost surely, 2^{1221020210300} is an apocalyptic number.

1221020210300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221020210300 is an abundant number, since it is smaller than the sum of its proper divisors (1669467635596).

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

1221020210300 is a wasteful number, since it uses less digits than its factorization.

1221020210300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110018398 (or 1110018391 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1221020210300 its reverse (30120201221), we get a palindrome (1251140411521).

The spelling of 1221020210300 in words is "one trillion, two hundred twenty-one billion, twenty million, two hundred ten thousand, three hundred".