21101011222010 has 32 divisors (see below), whose sum is σ = 38049016496400. Its totient is φ = 8425482867712.

The previous prime is 21101011221977. The next prime is 21101011222021. The reversal of 21101011222010 is 1022211010112.

It can be written as a sum of positive squares in 8 ways, for example, as 5170671235921 + 15930339986089 = 2273911^2 + 3991283^2 .

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, 14854322 + ... + 16212738.

Almost surely, 2^{21101011222010} is an apocalyptic number.

21101011222010 is a deficient number, since it is larger than the sum of its proper divisors (16948005274390).

21101011222010 is a wasteful number, since it uses less digits than its factorization.

21101011222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361170.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21101011222010 its reverse (1022211010112), we get a palindrome (22123222232122).

The spelling of 21101011222010 in words is "twenty-one trillion, one hundred one billion, eleven million, two hundred twenty-two thousand, ten".