21010202120222 has 32 divisors (see below), whose sum is σ = 38947572983808. Its totient is φ = 8294390534016.

The previous prime is 21010202120213. The next prime is 21010202120309. The reversal of 21010202120222 is 22202120201012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21010202120222.

It is a congruent number.

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, 939118178 + ... + 939140549.

It is an arithmetic number, because the mean of its divisors is an integer number (1217111655744).

Almost surely, 2^{21010202120222} is an apocalyptic number.

21010202120222 is a deficient number, since it is larger than the sum of its proper divisors (17937370863586).

21010202120222 is a wasteful number, since it uses less digits than its factorization.

21010202120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878258800.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21010202120222 its reverse (22202120201012), we get a palindrome (43212322321234).

The spelling of 21010202120222 in words is "twenty-one trillion, ten billion, two hundred two million, one hundred twenty thousand, two hundred twenty-two".