21101010010 has 8 divisors (see below), whose sum is σ = 37981818036. Its totient is φ = 8440404000.

The previous prime is 21101009999. The next prime is 21101010013. The reversal of 21101010010 is 1001010112.

It can be written as a sum of positive squares in 2 ways, for example, as 19276267921 + 1824742089 = 138839^2 + 42717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21101009975 and 21101010002.

It is not an unprimeable number, because it can be changed into a prime (21101010013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055050491 + ... + 1055050510.

Almost surely, 2^21101010010 is an apocalyptic number.

21101010010 is a deficient number, since it is larger than the sum of its proper divisors (16880808026).

21101010010 is a wasteful number, since it uses less digits than its factorization.

21101010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110101008.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 21101010010 its reverse (1001010112), we get a palindrome (22102020122).

The spelling of 21101010010 in words is "twenty-one billion, one hundred one million, ten thousand, ten".