211421051 has 12 divisors (see below), whose sum is σ = 218255856. Its totient is φ = 204790080.

The previous prime is 211421033. The next prime is 211421053. The reversal of 211421051 is 150124112.

It is not a de Polignac number, because 211421051 - 2¹⁴ = 211404667 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 (211421053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290450 + ... + 291176.

It is an arithmetic number, because the mean of its divisors is an integer number (18187988).

Almost surely, 2^211421051 is an apocalyptic number.

211421051 is a deficient number, since it is larger than the sum of its proper divisors (6834805).

211421051 is an equidigital number, since it uses as much as digits as its factorization.

211421051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 941 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 211421051 is about 14540.3249963679. The cubic root of 211421051 is about 595.7299151244.

Adding to 211421051 its reverse (150124112), we get a palindrome (361545163).

The spelling of 211421051 in words is "two hundred eleven million, four hundred twenty-one thousand, fifty-one".