21211442051610 has 32 divisors (see below), whose sum is σ = 50907807531072. Its totient is φ = 5656346035200.

The previous prime is 21211442051609. The next prime is 21211442051617. The reversal of 21211442051610 is 1615024411212.

21211442051610 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (21211442051617) 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, 2218362 + ... + 6880698.

It is an arithmetic number, because the mean of its divisors is an integer number (1590868985346).

Almost surely, 2^{21211442051610} is an apocalyptic number.

21211442051610 is an abundant number, since it is smaller than the sum of its proper divisors (29696365479462).

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

21211442051610 is a wasteful number, since it uses less digits than its factorization.

21211442051610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813998.

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 21211442051610 its reverse (1615024411212), we get a palindrome (22826466462822).

The spelling of 21211442051610 in words is "twenty-one trillion, two hundred eleven billion, four hundred forty-two million, fifty-one thousand, six hundred ten".