1210101010121 has 4 divisors (see below), whose sum is σ = 1219338422544. Its totient is φ = 1200863597700.

The previous prime is 1210101010117. The next prime is 1210101010147.

1210101010121 is nontrivially palindromic in base 10.

1210101010121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210101010121 - 2² = 1210101010117 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210101010721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4618706015 + ... + 4618706276.

It is an arithmetic number, because the mean of its divisors is an integer number (304834605636).

Almost surely, 2^{1210101010121} is an apocalyptic number.

It is an amenable number.

1210101010121 is a deficient number, since it is larger than the sum of its proper divisors (9237412423).

1210101010121 is an equidigital number, since it uses as much as digits as its factorization.

1210101010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9237412422.

The product of its (nonzero) digits is 4, while the sum is 11.

Multiplying 1210101010121 by its sum of digits (11), we get a palindrome (13311111111331).

The spelling of 1210101010121 in words is "one trillion, two hundred ten billion, one hundred one million, ten thousand, one hundred twenty-one".