21120210122010 has 64 divisors (see below), whose sum is σ = 52324332134400. Its totient is φ = 5450302347840.

The previous prime is 21120210122009. The next prime is 21120210122029. The reversal of 21120210122010 is 1022101202112.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109963041 + ... + 110154939.

It is an arithmetic number, because the mean of its divisors is an integer number (817567689600).

Almost surely, 2^{21120210122010} is an apocalyptic number.

21120210122010 is an abundant number, since it is smaller than the sum of its proper divisors (31204122012390).

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

21120210122010 is a wasteful number, since it uses less digits than its factorization.

21120210122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310283.

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

Adding to 21120210122010 its reverse (1022101202112), we get a palindrome (22142311324122).

The spelling of 21120210122010 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twenty-two thousand, ten".