21011211002210 has 128 divisors (see below), whose sum is σ = 44853446373120. Its totient is φ = 6985873382400.

The previous prime is 21011211002167. The next prime is 21011211002231. The reversal of 21011211002210 is 1220011211012.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 558151649 + ... + 558189291.

It is an arithmetic number, because the mean of its divisors is an integer number (350417549790).

Almost surely, 2^{21011211002210} is an apocalyptic number.

21011211002210 is an abundant number, since it is smaller than the sum of its proper divisors (23842235370910).

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

21011211002210 is a wasteful number, since it uses less digits than its factorization.

21011211002210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41364.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21011211002210 its reverse (1220011211012), we get a palindrome (22231222213222).

The spelling of 21011211002210 in words is "twenty-one trillion, eleven billion, two hundred eleven million, two thousand, two hundred ten".