21022301212 has 12 divisors (see below), whose sum is σ = 40133484216. Its totient is φ = 9555591440.

The previous prime is 21022301161. The next prime is 21022301221. The reversal of 21022301212 is 21210322012.

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 3 ways as a sum of consecutive naturals, for example, 238889743 + ... + 238889830.

It is an arithmetic number, because the mean of its divisors is an integer number (3344457018).

Almost surely, 2^21022301212 is an apocalyptic number.

21022301212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21022301212 is a deficient number, since it is larger than the sum of its proper divisors (19111183004).

21022301212 is a wasteful number, since it uses less digits than its factorization.

21022301212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477779588 (or 477779586 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21022301212 its reverse (21210322012), we get a palindrome (42232623224).

The spelling of 21022301212 in words is "twenty-one billion, twenty-two million, three hundred one thousand, two hundred twelve".