21012210020010 has 64 divisors (see below), whose sum is σ = 55015057004544. Its totient is φ = 5093751432000.

The previous prime is 21012210019993. The next prime is 21012210020047. The reversal of 21012210020010 is 1002001221012.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14020435 + ... + 15446585.

It is an arithmetic number, because the mean of its divisors is an integer number (859610265696).

Almost surely, 2^{21012210020010} is an apocalyptic number.

21012210020010 is an abundant number, since it is smaller than the sum of its proper divisors (34002846984534).

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

21012210020010 is a wasteful number, since it uses less digits than its factorization.

21012210020010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470819.

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

Adding to 21012210020010 its reverse (1002001221012), we get a palindrome (22014211241022).

The spelling of 21012210020010 in words is "twenty-one trillion, twelve billion, two hundred ten million, twenty thousand, ten".