21001011122202 has 32 divisors (see below), whose sum is σ = 42267439507392. Its totient is φ = 6956144185344.

The previous prime is 21001011122153. The next prime is 21001011122257. The reversal of 21001011122202 is 20222111010012.

It is a super-3 number, since 3×21001011122202³ (a number of 41 digits) contains 333 as substring.

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, 3480423 + ... + 7356314.

It is an arithmetic number, because the mean of its divisors is an integer number (1320857484606).

Almost surely, 2^{21001011122202} is an apocalyptic number.

21001011122202 is an abundant number, since it is smaller than the sum of its proper divisors (21266428385190).

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

21001011122202 is a wasteful number, since it uses less digits than its factorization.

21001011122202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10838782.

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

Adding to 21001011122202 its reverse (20222111010012), we get a palindrome (41223122132214).

The spelling of 21001011122202 in words is "twenty-one trillion, one billion, eleven million, one hundred twenty-two thousand, two hundred two".