1210011210121 has 6 divisors (see below), whose sum is σ = 1407564060810. Its totient is φ = 1037152465776.

The previous prime is 1210011210071. The next prime is 1210011210131. The reversal of 1210011210121 is 1210121100121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1142203050121 + 67808160000 = 1068739^2 + 260400^2 .

It is not a de Polignac number, because 1210011210121 - 2³⁹ = 660255396233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210011210131) 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 5 ways as a sum of consecutive naturals, for example, 12347053116 + ... + 12347053213.

It is an arithmetic number, because the mean of its divisors is an integer number (234594010135).

Almost surely, 2^{1210011210121} is an apocalyptic number.

It is an amenable number.

1210011210121 is a deficient number, since it is larger than the sum of its proper divisors (197552850689).

1210011210121 is an equidigital number, since it uses as much as digits as its factorization.

1210011210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24694106343 (or 24694106336 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210011210121 its reverse (1210121100121), we get a palindrome (2420132310242).

The spelling of 1210011210121 in words is "one trillion, two hundred ten billion, eleven million, two hundred ten thousand, one hundred twenty-one".