1220102210021 has 8 divisors (see below), whose sum is σ = 1227583954200. Its totient is φ = 1212639194880.

The previous prime is 1220102210011. The next prime is 1220102210053. The reversal of 1220102210021 is 1200122010221.

It can be written as a sum of positive squares in 4 ways, for example, as 698653581025 + 521448628996 = 835855^2 + 722114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220102210021 - 2¹⁴ = 1220102193637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220102209978 and 1220102210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220102210011) 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 7 ways as a sum of consecutive naturals, for example, 4551560 + ... + 4812161.

It is an arithmetic number, because the mean of its divisors is an integer number (153447994275).

Almost surely, 2^{1220102210021} is an apocalyptic number.

It is an amenable number.

1220102210021 is a deficient number, since it is larger than the sum of its proper divisors (7481744179).

1220102210021 is an equidigital number, since it uses as much as digits as its factorization.

1220102210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364519.

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

Adding to 1220102210021 its reverse (1200122010221), we get a palindrome (2420224220242).

The spelling of 1220102210021 in words is "one trillion, two hundred twenty billion, one hundred two million, two hundred ten thousand, twenty-one".