21101002101010 has 32 divisors (see below), whose sum is σ = 40904046070272. Its totient is φ = 7791031604160.

The previous prime is 21101002100977. The next prime is 21101002101167. The reversal of 21101002101010 is 1010120010112.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 8651575 + ... + 10819045.

It is an arithmetic number, because the mean of its divisors is an integer number (1278251439696).

Almost surely, 2^{21101002101010} is an apocalyptic number.

21101002101010 is a deficient number, since it is larger than the sum of its proper divisors (19803043969262).

21101002101010 is a wasteful number, since it uses less digits than its factorization.

21101002101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242378.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 21101002101010 its reverse (1010120010112), we get a palindrome (22111122111122).

The spelling of 21101002101010 in words is "twenty-one trillion, one hundred one billion, two million, one hundred one thousand, ten".