70012021 has 4 divisors (see below), whose sum is σ = 70320672. Its totient is φ = 69703372.

The previous prime is 70011983. The next prime is 70012039. The reversal of 70012021 is 12021007.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70012021 - 2¹⁷ = 69880949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70011992 and 70012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70022021) 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, 153985 + ... + 154438.

It is an arithmetic number, because the mean of its divisors is an integer number (17580168).

Almost surely, 2^70012021 is an apocalyptic number.

It is an amenable number.

70012021 is a deficient number, since it is larger than the sum of its proper divisors (308651).

70012021 is a wasteful number, since it uses less digits than its factorization.

70012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308650.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 70012021 is about 8367.3186266569. The cubic root of 70012021 is about 412.1521200451.

Adding to 70012021 its reverse (12021007), we get a palindrome (82033028).

It can be divided in two parts, 700 and 12021, that added together give a palindrome (12721).

The spelling of 70012021 in words is "seventy million, twelve thousand, twenty-one".