21910091210 has 16 divisors (see below), whose sum is σ = 45072187776. Its totient is φ = 7512031248.

The previous prime is 21910091209. The next prime is 21910091221. The reversal of 21910091210 is 1219001912.

It is a self number, because there is not a number n which added to its sum of digits gives 21910091210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156500582 + ... + 156500721.

It is an arithmetic number, because the mean of its divisors is an integer number (2817011736).

Almost surely, 2^21910091210 is an apocalyptic number.

21910091210 is an abundant number, since it is smaller than the sum of its proper divisors (23162096566).

21910091210 is a wasteful number, since it uses less digits than its factorization.

21910091210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313001317.

The product of its (nonzero) digits is 324, while the sum is 26.

The spelling of 21910091210 in words is "twenty-one billion, nine hundred ten million, ninety-one thousand, two hundred ten".