1421343121 has 24 divisors (see below), whose sum is σ = 1655708544. Its totient is φ = 1209420960.

The previous prime is 1421343109. The next prime is 1421343151. The reversal of 1421343121 is 1213431241.

It is not a de Polignac number, because 1421343121 - 2⁹ = 1421342609 is a prime.

It is a super-2 number, since 2×1421343121² = 4040432535228041282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1421343092 and 1421343101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421343101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270895 + ... + 276091.

It is an arithmetic number, because the mean of its divisors is an integer number (68987856).

Almost surely, 2^1421343121 is an apocalyptic number.

1421343121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421343121 is a deficient number, since it is larger than the sum of its proper divisors (234365423).

1421343121 is a wasteful number, since it uses less digits than its factorization.

1421343121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5301 (or 5278 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1421343121 is about 37700.7045159636. The cubic root of 1421343121 is about 1124.3451322222.

Adding to 1421343121 its reverse (1213431241), we get a palindrome (2634774362).

The spelling of 1421343121 in words is "one billion, four hundred twenty-one million, three hundred forty-three thousand, one hundred twenty-one".