210001201998 has 64 divisors (see below), whose sum is σ = 507532247040. Its totient is φ = 56587483872.

The previous prime is 210001201981. The next prime is 210001201999. The reversal of 210001201998 is 899102100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001201999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 412090 + ... + 767997.

It is an arithmetic number, because the mean of its divisors is an integer number (7930191360).

Almost surely, 2^210001201998 is an apocalyptic number.

210001201998 is an abundant number, since it is smaller than the sum of its proper divisors (297531045042).

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

210001201998 is a wasteful number, since it uses less digits than its factorization.

210001201998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180341.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 210001201998 in words is "two hundred ten billion, one million, two hundred one thousand, nine hundred ninety-eight".