10212111021220 has 24 divisors (see below), whose sum is σ = 21471941748600. Its totient is φ = 4079795150592.

The previous prime is 10212111021197. The next prime is 10212111021223. The reversal of 10212111021220 is 2212011121201.

It can be written as a sum of positive squares in 4 ways, for example, as 3508848268864 + 6703262752356 = 1873192^2 + 2589066^2 .

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 10212111021194 and 10212111021203.

It is not an unprimeable number, because it can be changed into a prime (10212111021223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315562035 + ... + 315594394.

It is an arithmetic number, because the mean of its divisors is an integer number (894664239525).

Almost surely, 2^{10212111021220} is an apocalyptic number.

10212111021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10212111021220 is an abundant number, since it is smaller than the sum of its proper divisors (11259830727380).

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

10212111021220 is a wasteful number, since it uses less digits than its factorization.

10212111021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631157247 (or 631157245 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 10212111021220 its reverse (2212011121201), we get a palindrome (12424122142421).

The spelling of 10212111021220 in words is "ten trillion, two hundred twelve billion, one hundred eleven million, twenty-one thousand, two hundred twenty".