21320102012 has 24 divisors (see below), whose sum is σ = 41159346480. Its totient is φ = 9582066560.

The previous prime is 21320102003. The next prime is 21320102053. The reversal of 21320102012 is 21020102312.

It is a happy number.

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, 2718263 + ... + 2726094.

It is an arithmetic number, because the mean of its divisors is an integer number (1714972770).

Almost surely, 2^21320102012 is an apocalyptic number.

21320102012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21320102012 is a deficient number, since it is larger than the sum of its proper divisors (19839244468).

21320102012 is a wasteful number, since it uses less digits than its factorization.

21320102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444461 (or 5444459 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21320102012 its reverse (21020102312), we get a palindrome (42340204324).

The spelling of 21320102012 in words is "twenty-one billion, three hundred twenty million, one hundred two thousand, twelve".