21012022102 has 8 divisors (see below), whose sum is σ = 31522264200. Its totient is φ = 10504600704.

The previous prime is 21012022069. The next prime is 21012022103. The reversal of 21012022102 is 20122021012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012022103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686452 + ... + 716407.

It is an arithmetic number, because the mean of its divisors is an integer number (3940283025).

Almost surely, 2^21012022102 is an apocalyptic number.

21012022102 is a deficient number, since it is larger than the sum of its proper divisors (10510242098).

21012022102 is a wasteful number, since it uses less digits than its factorization.

21012022102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410350.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21012022102 its reverse (20122021012), we get a palindrome (41134043114).

The spelling of 21012022102 in words is "twenty-one billion, twelve million, twenty-two thousand, one hundred two".