1213100441 has 4 divisors (see below), whose sum is σ = 1386400512. Its totient is φ = 1039800372.

The previous prime is 1213100419. The next prime is 1213100453. The reversal of 1213100441 is 1440013121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1440013121 = 3469 ⋅415109.

It is a cyclic number.

It is not a de Polignac number, because 1213100441 - 2²⁶ = 1145991577 is a prime.

It is a super-2 number, since 2×1213100441² = 2943225359908788962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1213100461) 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, 86650025 + ... + 86650038.

It is an arithmetic number, because the mean of its divisors is an integer number (346600128).

Almost surely, 2^1213100441 is an apocalyptic number.

It is an amenable number.

1213100441 is a deficient number, since it is larger than the sum of its proper divisors (173300071).

1213100441 is an equidigital number, since it uses as much as digits as its factorization.

1213100441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173300070.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1213100441 is about 34829.5914561167. The cubic root of 1213100441 is about 1066.5116083960.

Adding to 1213100441 its reverse (1440013121), we get a palindrome (2653113562).

The spelling of 1213100441 in words is "one billion, two hundred thirteen million, one hundred thousand, four hundred forty-one".