1001212121210 has 16 divisors (see below), whose sum is σ = 2059636363776. Its totient is φ = 343272727248.

The previous prime is 1001212121197. The next prime is 1001212121213. The reversal of 1001212121210 is 121212121001.

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

It is not an unprimeable number, because it can be changed into a prime (1001212121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7151515082 + ... + 7151515221.

It is an arithmetic number, because the mean of its divisors is an integer number (128727272736).

Almost surely, 2^{1001212121210} is an apocalyptic number.

1001212121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001212121210 is an abundant number, since it is smaller than the sum of its proper divisors (1058424242566).

1001212121210 is a wasteful number, since it uses less digits than its factorization.

1001212121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14303030317.

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

Adding to 1001212121210 its reverse (121212121001), we get a palindrome (1122424242211).

The spelling of 1001212121210 in words is "one trillion, one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred ten".