21022211010 has 64 divisors (see below), whose sum is σ = 51376604544. Its totient is φ = 5503680000.

The previous prime is 21022210987. The next prime is 21022211011. The reversal of 21022211010 is 1011222012.

It is not an unprimeable number, because it can be changed into a prime (21022211011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990510 + ... + 1011510.

It is an arithmetic number, because the mean of its divisors is an integer number (802759446).

Almost surely, 2^21022211010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21022211010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25688302272).

21022211010 is an abundant number, since it is smaller than the sum of its proper divisors (30354393534).

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

21022211010 is a wasteful number, since it uses less digits than its factorization.

21022211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21619.

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

Adding to 21022211010 its reverse (1011222012), we get a palindrome (22033433022).

The spelling of 21022211010 in words is "twenty-one billion, twenty-two million, two hundred eleven thousand, ten".