1021212101210 has 48 divisors (see below), whose sum is σ = 2147630853960. Its totient is φ = 348600873600.

The previous prime is 1021212101177. The next prime is 1021212101269. The reversal of 1021212101210 is 121012121201.

It can be written as a sum of positive squares in 4 ways, for example, as 1018026514729 + 3185586481 = 1008973^2 + 56441^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 4438241 + ... + 4662660.

Almost surely, 2^{1021212101210} is an apocalyptic number.

1021212101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021212101210 is an abundant number, since it is smaller than the sum of its proper divisors (1126418752750).

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

1021212101210 is a wasteful number, since it uses less digits than its factorization.

1021212101210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9101151 (or 9101144 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021212101210 its reverse (121012121201), we get a palindrome (1142224222411).

The spelling of 1021212101210 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred one thousand, two hundred ten".