21201101222010 has 32 divisors (see below), whose sum is σ = 52257849501312. Its totient is φ = 5500826262720.

The previous prime is 21201101221921. The next prime is 21201101222029. The reversal of 21201101222010 is 1022210110212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9550044486 + ... + 9550046705.

It is an arithmetic number, because the mean of its divisors is an integer number (1633057796916).

Almost surely, 2^{21201101222010} is an apocalyptic number.

21201101222010 is an abundant number, since it is smaller than the sum of its proper divisors (31056748279302).

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

21201101222010 is a wasteful number, since it uses less digits than its factorization.

21201101222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19100091238.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201101222010 its reverse (1022210110212), we get a palindrome (22223311332222).

The spelling of 21201101222010 in words is "twenty-one trillion, two hundred one billion, one hundred one million, two hundred twenty-two thousand, ten".