21032220210 has 16 divisors (see below), whose sum is σ = 50477328576. Its totient is φ = 5608592048.

The previous prime is 21032220173. The next prime is 21032220229. The reversal of 21032220210 is 1202223012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21032220210.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350536974 + ... + 350537033.

It is an arithmetic number, because the mean of its divisors is an integer number (3154833036).

Almost surely, 2^21032220210 is an apocalyptic number.

21032220210 is an abundant number, since it is smaller than the sum of its proper divisors (29445108366).

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

21032220210 is a wasteful number, since it uses less digits than its factorization.

21032220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701074017.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21032220210 its reverse (1202223012), we get a palindrome (22234443222).

The spelling of 21032220210 in words is "twenty-one billion, thirty-two million, two hundred twenty thousand, two hundred ten".