21621606020110 has 16 divisors (see below), whose sum is σ = 38918989890432. Its totient is φ = 8648620396000.

The previous prime is 21621606020083. The next prime is 21621606020111. The reversal of 21621606020110 is 1102060612612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621606020111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1720035 + ... + 6797185.

It is an arithmetic number, because the mean of its divisors is an integer number (2432436868152).

Almost surely, 2^{21621606020110} is an apocalyptic number.

21621606020110 is a deficient number, since it is larger than the sum of its proper divisors (17297383870322).

21621606020110 is a wasteful number, since it uses less digits than its factorization.

21621606020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503019.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 21621606020110 its reverse (1102060612612), we get a palindrome (22723666632722).

The spelling of 21621606020110 in words is "twenty-one trillion, six hundred twenty-one billion, six hundred six million, twenty thousand, one hundred ten".