1421145121 has 24 divisors (see below), whose sum is σ = 1639172864. Its totient is φ = 1229580000.

The previous prime is 1421145119. The next prime is 1421145149. The reversal of 1421145121 is 1215411241.

It is a happy number.

It is not a de Polignac number, because 1421145121 - 2¹ = 1421145119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1421145092 and 1421145101.

It is not an unprimeable number, because it can be changed into a prime (1421145151) 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, 225706 + ... + 231916.

Almost surely, 2^1421145121 is an apocalyptic number.

1421145121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421145121 is a deficient number, since it is larger than the sum of its proper divisors (218027743).

1421145121 is a wasteful number, since it uses less digits than its factorization.

1421145121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325 (or 6314 counting only the distinct ones).

The product of its digits is 320, while the sum is 22.

The square root of 1421145121 is about 37698.0784788827. The cubic root of 1421145121 is about 1124.2929208851.

Adding to 1421145121 its reverse (1215411241), we get a palindrome (2636556362).

The spelling of 1421145121 in words is "one billion, four hundred twenty-one million, one hundred forty-five thousand, one hundred twenty-one".