1241212621 has 4 divisors (see below), whose sum is σ = 1354050144. Its totient is φ = 1128375100.

The previous prime is 1241212607. The next prime is 1241212633. The reversal of 1241212621 is 1262121421.

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: 1262121421 = 11 ⋅114738311.

It is a cyclic number.

It is not a de Polignac number, because 1241212621 - 2⁵ = 1241212589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241212592 and 1241212601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241212691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56418745 + ... + 56418766.

It is an arithmetic number, because the mean of its divisors is an integer number (338512536).

Almost surely, 2^1241212621 is an apocalyptic number.

1241212621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1241212621 is a deficient number, since it is larger than the sum of its proper divisors (112837523).

1241212621 is a wasteful number, since it uses less digits than its factorization.

1241212621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112837522.

The product of its digits is 384, while the sum is 22.

The square root of 1241212621 is about 35230.8475770879. The cubic root of 1241212621 is about 1074.6871621873.

The spelling of 1241212621 in words is "one billion, two hundred forty-one million, two hundred twelve thousand, six hundred twenty-one".