1210121210001 has 16 divisors (see below), whose sum is σ = 1760904669888. Its totient is φ = 733103308800.

The previous prime is 1210121209967. The next prime is 1210121210017. The reversal of 1210121210001 is 1000121210121.

It is not a de Polignac number, because 1210121210001 - 2²⁷ = 1209986992273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1210121211001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7506160 + ... + 7665681.

It is an arithmetic number, because the mean of its divisors is an integer number (110056541868).

Almost surely, 2^{1210121210001} is an apocalyptic number.

1210121210001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210121210001 is a deficient number, since it is larger than the sum of its proper divisors (550783459887).

1210121210001 is a wasteful number, since it uses less digits than its factorization.

1210121210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15174272.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1210121210001 its reverse (1000121210121), we get a palindrome (2210242420122).

The spelling of 1210121210001 in words is "one trillion, two hundred ten billion, one hundred twenty-one million, two hundred ten thousand, one".