210021211001 has 16 divisors (see below), whose sum is σ = 246409701888. Its totient is φ = 175248057600.

The previous prime is 210021210991. The next prime is 210021211003. The reversal of 210021211001 is 100112120012.

It is a de Polignac number, because none of the positive numbers 2^k-210021211001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210021211003) 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, 657380 + ... + 923141.

It is an arithmetic number, because the mean of its divisors is an integer number (15400606368).

Almost surely, 2^210021211001 is an apocalyptic number.

It is an amenable number.

210021211001 is a deficient number, since it is larger than the sum of its proper divisors (36388490887).

210021211001 is a wasteful number, since it uses less digits than its factorization.

210021211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581032.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210021211001 its reverse (100112120012), we get a palindrome (310133331013).

The spelling of 210021211001 in words is "two hundred ten billion, twenty-one million, two hundred eleven thousand, one".