21022011102 has 16 divisors (see below), whose sum is σ = 42295784832. Its totient is φ = 6965376600.

The previous prime is 21022011091. The next prime is 21022011119. The reversal of 21022011102 is 20111022012.

It is a super-2 number, since 2×21022011102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10489024 + ... + 10491027.

It is an arithmetic number, because the mean of its divisors is an integer number (2643486552).

Almost surely, 2^21022011102 is an apocalyptic number.

21022011102 is an abundant number, since it is smaller than the sum of its proper divisors (21273773730).

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

21022011102 is a wasteful number, since it uses less digits than its factorization.

21022011102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20980223.

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

Adding to 21022011102 its reverse (20111022012), we get a palindrome (41133033114).

The spelling of 21022011102 in words is "twenty-one billion, twenty-two million, eleven thousand, one hundred two".