21001000101010 has 32 divisors (see below), whose sum is σ = 39999700454400. Its totient is φ = 7916607354240.

The previous prime is 21001000100923. The next prime is 21001000101013. The reversal of 21001000101010 is 1010100010012.

It is a junction number, because it is equal to n+sod(n) for n = 21001000100984 and 21001000101002.

It is not an unprimeable number, because it can be changed into a prime (21001000101013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289313395 + ... + 289385974.

It is an arithmetic number, because the mean of its divisors is an integer number (1249990639200).

Almost surely, 2^{21001000101010} is an apocalyptic number.

21001000101010 is a deficient number, since it is larger than the sum of its proper divisors (18998700353390).

21001000101010 is a wasteful number, since it uses less digits than its factorization.

21001000101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578699586.

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

Adding to 21001000101010 its reverse (1010100010012), we get a palindrome (22011100111022).

The spelling of 21001000101010 in words is "twenty-one trillion, one billion, one hundred one thousand, ten".