21011000220210 has 192 divisors, whose sum is σ = 68077385763840. Its totient is φ = 4030081885440.

The previous prime is 21011000220193. The next prime is 21011000220277. The reversal of 21011000220210 is 1202200011012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26519880 + ... + 27300659.

It is an arithmetic number, because the mean of its divisors is an integer number (354569717520).

Almost surely, 2^{21011000220210} is an apocalyptic number.

21011000220210 is an abundant number, since it is smaller than the sum of its proper divisors (47066385543630).

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

21011000220210 is a wasteful number, since it uses less digits than its factorization.

21011000220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53820593 (or 53820580 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21011000220210 its reverse (1202200011012), we get a palindrome (22213200231222).

The spelling of 21011000220210 in words is "twenty-one trillion, eleven billion, two hundred twenty thousand, two hundred ten".