21012211010010 has 32 divisors (see below), whose sum is σ = 55013788827072. Its totient is φ = 5093869335680.

The previous prime is 21012211009981. The next prime is 21012211010053. The reversal of 21012211010010 is 1001011221012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31836683019 + ... + 31836683678.

It is an arithmetic number, because the mean of its divisors is an integer number (1719180900846).

Almost surely, 2^{21012211010010} is an apocalyptic number.

21012211010010 is an abundant number, since it is smaller than the sum of its proper divisors (34001577817062).

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

21012211010010 is a wasteful number, since it uses less digits than its factorization.

21012211010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63673366718.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21012211010010 its reverse (1001011221012), we get a palindrome (22013222231022).

The spelling of 21012211010010 in words is "twenty-one trillion, twelve billion, two hundred eleven million, ten thousand, ten".