221200211021000 has 128 divisors (see below), whose sum is σ = 533592235238400. Its totient is φ = 85788907660800.

The previous prime is 221200211020897. The next prime is 221200211021003. The reversal of 221200211021000 is 120112002122.

It is not an unprimeable number, because it can be changed into a prime (221200211021003) 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, 21372152 + ... + 29986151.

It is an arithmetic number, because the mean of its divisors is an integer number (4168689337800).

Almost surely, 2^{221200211021000} is an apocalyptic number.

221200211021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200211021000 is an abundant number, since it is smaller than the sum of its proper divisors (312392024217400).

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

221200211021000 is a wasteful number, since it uses less digits than its factorization.

221200211021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51358456 (or 51358442 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221200211021000 its reverse (120112002122), we get a palindrome (221320323023122).

The spelling of 221200211021000 in words is "two hundred twenty-one trillion, two hundred billion, two hundred eleven million, twenty-one thousand".