213021042 has 32 divisors (see below), whose sum is σ = 460494720. Its totient is φ = 65304960.

The previous prime is 213021041. The next prime is 213021043. The reversal of 213021042 is 240120312.

213021042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213021041) and next prime (213021043).

It is not an unprimeable number, because it can be changed into a prime (213021041) 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, 17059 + ... + 26777.

It is an arithmetic number, because the mean of its divisors is an integer number (14390460).

Almost surely, 2^213021042 is an apocalyptic number.

213021042 is an abundant number, since it is smaller than the sum of its proper divisors (247473678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213021042 is a wasteful number, since it uses less digits than its factorization.

213021042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10018.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 213021042 is about 14595.2403885650. The cubic root of 213021042 is about 597.2289271837.

Adding to 213021042 its reverse (240120312), we get a palindrome (453141354).

The spelling of 213021042 in words is "two hundred thirteen million, twenty-one thousand, forty-two".