21022102010 has 96 divisors (see below), whose sum is σ = 47668198032. Its totient is φ = 6616028160.

The previous prime is 21022102009. The next prime is 21022102019. The reversal of 21022102010 is 1020122012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1263020521 + 19759081489 = 35539^2 + 140567^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21022101982 and 21022102000.

It is not an unprimeable number, because it can be changed into a prime (21022102019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1143854 + ... + 1162086.

Almost surely, 2^21022102010 is an apocalyptic number.

21022102010 is an abundant number, since it is smaller than the sum of its proper divisors (26646096022).

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

21022102010 is a wasteful number, since it uses less digits than its factorization.

21022102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18448 (or 18441 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21022102010 its reverse (1020122012), we get a palindrome (22042224022).

The spelling of 21022102010 in words is "twenty-one billion, twenty-two million, one hundred two thousand, ten".