1212120021010 has 16 divisors (see below), whose sum is σ = 2181881100672. Its totient is φ = 484833550000.

The previous prime is 1212120020959. The next prime is 1212120021023. The reversal of 1212120021010 is 101200212121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451866 + ... + 2128885.

It is an arithmetic number, because the mean of its divisors is an integer number (136367568792).

Almost surely, 2^{1212120021010} is an apocalyptic number.

1212120021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212120021010 is a deficient number, since it is larger than the sum of its proper divisors (969761079662).

1212120021010 is a wasteful number, since it uses less digits than its factorization.

1212120021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614609.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212120021010 its reverse (101200212121), we get a palindrome (1313320233131).

The spelling of 1212120021010 in words is "one trillion, two hundred twelve billion, one hundred twenty million, twenty-one thousand, ten".