1421011421 has 2 divisors, whose sum is σ = 1421011422. Its totient is φ = 1421011420.

The previous prime is 1421011393. The next prime is 1421011451. The reversal of 1421011421 is 1241101241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1107225625 + 313785796 = 33275^2 + 17714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421011421 - 2¹⁸ = 1420749277 is a prime.

It is a super-2 number, since 2×1421011421² = 4038546917224878482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1421011421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421011451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710505710 + 710505711.

It is an arithmetic number, because the mean of its divisors is an integer number (710505711).

Almost surely, 2^1421011421 is an apocalyptic number.

It is an amenable number.

1421011421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421011421 is an equidigital number, since it uses as much as digits as its factorization.

1421011421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1421011421 is about 37696.3051372412. The cubic root of 1421011421 is about 1124.2576623049.

Adding to 1421011421 its reverse (1241101241), we get a palindrome (2662112662).

The spelling of 1421011421 in words is "one billion, four hundred twenty-one million, eleven thousand, four hundred twenty-one".