1210440121 has 8 divisors (see below), whose sum is σ = 1320732864. Its totient is φ = 1100189520.

The previous prime is 1210440109. The next prime is 1210440151.

It is a happy number.

1210440121 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210440121 - 2¹⁵ = 1210407353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210440095 and 1210440104.

It is not an unprimeable number, because it can be changed into a prime (1210440151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100020 + ... + 111466.

It is an arithmetic number, because the mean of its divisors is an integer number (165091608).

Almost surely, 2^1210440121 is an apocalyptic number.

1210440121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210440121 is a deficient number, since it is larger than the sum of its proper divisors (110292743).

1210440121 is a wasteful number, since it uses less digits than its factorization.

1210440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21071.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1210440121 is about 34791.3799812540. The cubic root of 1210440121 is about 1065.7314205325.

It can be divided in two parts, 12104 and 40121, that added together give a palindrome (52225).

The spelling of 1210440121 in words is "one billion, two hundred ten million, four hundred forty thousand, one hundred twenty-one".