21011210220010 has 64 divisors (see below), whose sum is σ = 38670039353088. Its totient is φ = 8217664000000.

The previous prime is 21011210219977. The next prime is 21011210220017. The reversal of 21011210220010 is 1002201211012.

It is not an unprimeable number, because it can be changed into a prime (21011210220017) 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, 148838460 + ... + 148979560.

It is an arithmetic number, because the mean of its divisors is an integer number (604219364892).

Almost surely, 2^{21011210220010} is an apocalyptic number.

21011210220010 is a deficient number, since it is larger than the sum of its proper divisors (17658829133078).

21011210220010 is a wasteful number, since it uses less digits than its factorization.

21011210220010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142911.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011210220010 its reverse (1002201211012), we get a palindrome (22013411431022).

The spelling of 21011210220010 in words is "twenty-one trillion, eleven billion, two hundred ten million, two hundred twenty thousand, ten".