21011010110010 has 32 divisors (see below), whose sum is σ = 56029360294080. Its totient is φ = 5602936029264.

The previous prime is 21011010110003. The next prime is 21011010110021. The reversal of 21011010110010 is 1001101011012.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 21011010109974 and 21011010110001.

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, 38909277712 + ... + 38909278251.

It is an arithmetic number, because the mean of its divisors is an integer number (1750917509190).

Almost surely, 2^{21011010110010} is an apocalyptic number.

21011010110010 is an abundant number, since it is smaller than the sum of its proper divisors (35018350184070).

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

21011010110010 is a wasteful number, since it uses less digits than its factorization.

21011010110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77818555979 (or 77818555973 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 21011010110010 its reverse (1001101011012), we get a palindrome (22012111121022).

The spelling of 21011010110010 in words is "twenty-one trillion, eleven billion, ten million, one hundred ten thousand, ten".