1421012081 has 2 divisors, whose sum is σ = 1421012082. Its totient is φ = 1421012080.

The previous prime is 1421012063. The next prime is 1421012107. The reversal of 1421012081 is 1802101241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1412256400 + 8755681 = 37580^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421012081 - 2¹⁰ = 1421011057 is a prime.

It is a super-2 number, since 2×1421012081² = 4038550668695901122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1421012011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710506040 + 710506041.

It is an arithmetic number, because the mean of its divisors is an integer number (710506041).

Almost surely, 2^1421012081 is an apocalyptic number.

It is an amenable number.

1421012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421012081 is an equidigital number, since it uses as much as digits as its factorization.

1421012081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 1421012081 is about 37696.3138914138. The cubic root of 1421012081 is about 1124.2578363616.

The spelling of 1421012081 in words is "one billion, four hundred twenty-one million, twelve thousand, eighty-one".