21221212094 has 8 divisors (see below), whose sum is σ = 31832984448. Its totient is φ = 10610217280.

The previous prime is 21221212079. The next prime is 21221212109. The reversal of 21221212094 is 49021212212.

It is an interprime number because it is at equal distance from previous prime (21221212079) and next prime (21221212109).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120542 + ... + 238689.

It is an arithmetic number, because the mean of its divisors is an integer number (3979123056).

Almost surely, 2^21221212094 is an apocalyptic number.

21221212094 is a deficient number, since it is larger than the sum of its proper divisors (10611772354).

21221212094 is a wasteful number, since it uses less digits than its factorization.

21221212094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388770.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 21221212094 in words is "twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, ninety-four".