21202111002 has 32 divisors (see below), whose sum is σ = 42513609600. Its totient is φ = 7049161728.

The previous prime is 21202110977. The next prime is 21202111031. The reversal of 21202111002 is 20011120212.

It is a super-2 number, since 2×21202111002² (a number of 21 digits) contains 22 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, 6884499 + ... + 6887577.

It is an arithmetic number, because the mean of its divisors is an integer number (1328550300).

Almost surely, 2^21202111002 is an apocalyptic number.

21202111002 is an abundant number, since it is smaller than the sum of its proper divisors (21311498598).

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

21202111002 is a wasteful number, since it uses less digits than its factorization.

21202111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21202111002 its reverse (20011120212), we get a palindrome (41213231214).

The spelling of 21202111002 in words is "twenty-one billion, two hundred two million, one hundred eleven thousand, two".