211142020 has 12 divisors (see below), whose sum is σ = 443398284. Its totient is φ = 84456800.

The previous prime is 211141999. The next prime is 211142033. The reversal of 211142020 is 20241112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 109495296 + 101646724 = 10464^2 + 10082^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5278531 + ... + 5278570.

It is an arithmetic number, because the mean of its divisors is an integer number (36949857).

Almost surely, 2^211142020 is an apocalyptic number.

211142020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211142020 is an abundant number, since it is smaller than the sum of its proper divisors (232256264).

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

211142020 is a wasteful number, since it uses less digits than its factorization.

211142020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10557110 (or 10557108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 211142020 is about 14530.7267540203. The cubic root of 211142020 is about 595.4677206473.

Adding to 211142020 its reverse (20241112), we get a palindrome (231383132).

The spelling of 211142020 in words is "two hundred eleven million, one hundred forty-two thousand, twenty".