21100222010 has 32 divisors (see below), whose sum is σ = 45959477760. Its totient is φ = 6808810752.

The previous prime is 21100221997. The next prime is 21100222043. The reversal of 21100222010 is 1022200112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21100221982 and 21100222000.

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, 8864450 + ... + 8866829.

It is an arithmetic number, because the mean of its divisors is an integer number (1436233680).

Almost surely, 2^21100222010 is an apocalyptic number.

21100222010 is an abundant number, since it is smaller than the sum of its proper divisors (24859255750).

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

21100222010 is a wasteful number, since it uses less digits than its factorization.

21100222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17731310.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21100222010 its reverse (1022200112), we get a palindrome (22122422122).

The spelling of 21100222010 in words is "twenty-one billion, one hundred million, two hundred twenty-two thousand, ten".