21210101120202 has 32 divisors (see below), whose sum is σ = 44266984410240. Its totient is φ = 6762270366720.

The previous prime is 21210101120107. The next prime is 21210101120231. The reversal of 21210101120202 is 20202110101212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1677999 + ... + 6725762.

It is an arithmetic number, because the mean of its divisors is an integer number (1383343262820).

Almost surely, 2^{21210101120202} is an apocalyptic number.

21210101120202 is an abundant number, since it is smaller than the sum of its proper divisors (23056883290038).

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

21210101120202 is a wasteful number, since it uses less digits than its factorization.

21210101120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8422078.

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

Adding to 21210101120202 its reverse (20202110101212), we get a palindrome (41412211221414).

The spelling of 21210101120202 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred twenty thousand, two hundred two".