21122021210110 has 16 divisors (see below), whose sum is σ = 38500899422400. Its totient is φ = 8341861540896.

The previous prime is 21122021210063. The next prime is 21122021210111. The reversal of 21122021210110 is 1101212022112.

It is a super-2 number, since 2×21122021210110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122021210111) 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, 13368367065 + ... + 13368368644.

It is an arithmetic number, because the mean of its divisors is an integer number (2406306213900).

Almost surely, 2^{21122021210110} is an apocalyptic number.

21122021210110 is a deficient number, since it is larger than the sum of its proper divisors (17378878212290).

21122021210110 is a wasteful number, since it uses less digits than its factorization.

21122021210110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26736735795.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21122021210110 its reverse (1101212022112), we get a palindrome (22223233232222).

The spelling of 21122021210110 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, two hundred ten thousand, one hundred ten".