21022101201210 has 32 divisors (see below), whose sum is σ = 51816638639232. Its totient is φ = 5454383014080.

The previous prime is 21022101201197. The next prime is 21022101201271. The reversal of 21022101201210 is 1210210122012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21022101201210.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9469413846 + ... + 9469416065.

It is an arithmetic number, because the mean of its divisors is an integer number (1619269957476).

Almost surely, 2^{21022101201210} is an apocalyptic number.

21022101201210 is an abundant number, since it is smaller than the sum of its proper divisors (30794537438022).

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

21022101201210 is a wasteful number, since it uses less digits than its factorization.

21022101201210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18938829958.

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

Adding to 21022101201210 its reverse (1210210122012), we get a palindrome (22232311323222).

The spelling of 21022101201210 in words is "twenty-one trillion, twenty-two billion, one hundred one million, two hundred one thousand, two hundred ten".