1012000421 has 4 divisors (see below), whose sum is σ = 1012174092. Its totient is φ = 1011826752.

The previous prime is 1012000403. The next prime is 1012000427. The reversal of 1012000421 is 1240002101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1240002101 = 13 ⋅95384777.

It can be written as a sum of positive squares in 2 ways, for example, as 56325025 + 955675396 = 7505^2 + 30914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012000421 - 2¹⁰ = 1011999397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012000427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77780 + ... + 89853.

It is an arithmetic number, because the mean of its divisors is an integer number (253043523).

Almost surely, 2^1012000421 is an apocalyptic number.

It is an amenable number.

1012000421 is a deficient number, since it is larger than the sum of its proper divisors (173671).

1012000421 is an equidigital number, since it uses as much as digits as its factorization.

1012000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173670.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1012000421 is about 31811.9540581839. The cubic root of 1012000421 is about 1003.9842450425.

Adding to 1012000421 its reverse (1240002101), we get a palindrome (2252002522).

The spelling of 1012000421 in words is "one billion, twelve million, four hundred twenty-one", and thus it is an aban number.