1010101212121 has 4 divisors (see below), whose sum is σ = 1013747787172. Its totient is φ = 1006454637072.

The previous prime is 1010101212119. The next prime is 1010101212163. The reversal of 1010101212121 is 1212121010101.

It is a happy number.

1010101212121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 524264331721 + 485836880400 = 724061^2 + 697020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010101212121 - 2¹ = 1010101212119 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 (1010101215121) 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, 1823287110 + ... + 1823287663.

It is an arithmetic number, because the mean of its divisors is an integer number (253436946793).

Almost surely, 2^{1010101212121} is an apocalyptic number.

It is an amenable number.

1010101212121 is a deficient number, since it is larger than the sum of its proper divisors (3646575051).

1010101212121 is an equidigital number, since it uses as much as digits as its factorization.

1010101212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646575050.

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

Adding to 1010101212121 its reverse (1212121010101), we get a palindrome (2222222222222).

It can be divided in two parts, 101010 and 1212121, that added together give a palindrome (1313131).

The spelling of 1010101212121 in words is "one trillion, ten billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".