210056899221 has 12 divisors (see below), whose sum is σ = 326755176748. Its totient is φ = 129265784064.

The previous prime is 210056899201. The next prime is 210056899223. The reversal of 210056899221 is 122998650012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136892600100 + 73164299121 = 369990^2 + 270489^2 .

It is not a de Polignac number, because 210056899221 - 2¹⁴ = 210056882837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210056899223) 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, 897678940 + ... + 897679173.

Almost surely, 2^210056899221 is an apocalyptic number.

It is an amenable number.

210056899221 is a deficient number, since it is larger than the sum of its proper divisors (116698277527).

210056899221 is a wasteful number, since it uses less digits than its factorization.

210056899221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795358132 (or 1795358129 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 210056899221 in words is "two hundred ten billion, fifty-six million, eight hundred ninety-nine thousand, two hundred twenty-one".