21011212010210 has 32 divisors (see below), whose sum is σ = 38303362771200. Its totient is φ = 8297135907840.

The previous prime is 21011212010143. The next prime is 21011212010231. The reversal of 21011212010210 is 1201021211012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287421 + ... + 8365359.

It is an arithmetic number, because the mean of its divisors is an integer number (1196980086600).

Almost surely, 2^{21011212010210} is an apocalyptic number.

21011212010210 is a deficient number, since it is larger than the sum of its proper divisors (17292150760990).

21011212010210 is a wasteful number, since it uses less digits than its factorization.

21011212010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086666.

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

Adding to 21011212010210 its reverse (1201021211012), we get a palindrome (22212233221222).

The spelling of 21011212010210 in words is "twenty-one trillion, eleven billion, two hundred twelve million, ten thousand, two hundred ten".