21121151420306 has 8 divisors (see below), whose sum is σ = 36207688149120. Its totient is φ = 9051922037268.

The previous prime is 21121151420273. The next prime is 21121151420309. The reversal of 21121151420306 is 60302415112112.

It is a happy number.

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

It is a super-2 number, since 2×21121151420306² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121151420309) by changing a digit.

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, 754326836426 + ... + 754326836453.

It is an arithmetic number, because the mean of its divisors is an integer number (4525961018640).

Almost surely, 2^{21121151420306} is an apocalyptic number.

21121151420306 is a deficient number, since it is larger than the sum of its proper divisors (15086536728814).

21121151420306 is a wasteful number, since it uses less digits than its factorization.

21121151420306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508653672888.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 21121151420306 its reverse (60302415112112), we get a palindrome (81423566532418).

The spelling of 21121151420306 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred fifty-one million, four hundred twenty thousand, three hundred six".