1210010211121 has 4 divisors (see below), whose sum is σ = 1217004489972. Its totient is φ = 1203015932272.

The previous prime is 1210010211103. The next prime is 1210010211149. The reversal of 1210010211121 is 1211120100121.

It is a happy number.

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 887908559521 + 322101651600 = 942289^2 + 567540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210010211121 - 2¹¹ = 1210010209073 is a prime.

It is a super-2 number, since 2×1210010211121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210010211101) 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, 3497139166 + ... + 3497139511.

It is an arithmetic number, because the mean of its divisors is an integer number (304251122493).

Almost surely, 2^{1210010211121} is an apocalyptic number.

It is an amenable number.

1210010211121 is a deficient number, since it is larger than the sum of its proper divisors (6994278851).

1210010211121 is an equidigital number, since it uses as much as digits as its factorization.

1210010211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6994278850.

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

Adding to 1210010211121 its reverse (1211120100121), we get a palindrome (2421130311242).

The spelling of 1210010211121 in words is "one trillion, two hundred ten billion, ten million, two hundred eleven thousand, one hundred twenty-one".