70122021 has 16 divisors (see below), whose sum is σ = 95800320. Its totient is φ = 45606080.

The previous prime is 70122011. The next prime is 70122043. The reversal of 70122021 is 12022107.

It is a cyclic number.

It is not a de Polignac number, because 70122021 - 2⁷ = 70121893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70122011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29215 + ... + 31523.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^70122021 is an apocalyptic number.

It is an amenable number.

70122021 is a deficient number, since it is larger than the sum of its proper divisors (25678299).

70122021 is a wasteful number, since it uses less digits than its factorization.

70122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 70122021 is about 8373.8892397738. The cubic root of 70122021 is about 412.3678592354.

Adding to 70122021 its reverse (12022107), we get a palindrome (82144128).

It can be divided in two parts, 701 and 22021, that added together give a palindrome (22722).

The spelling of 70122021 in words is "seventy million, one hundred twenty-two thousand, twenty-one".