21121154302 has 8 divisors (see below), whose sum is σ = 31685599656. Its totient is φ = 10559287752.

The previous prime is 21121154293. The next prime is 21121154309. The reversal of 21121154302 is 20345112112.

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

It is a super-2 number, since 2×21121154302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121154309) 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, 624093 + ... + 657064.

It is an arithmetic number, because the mean of its divisors is an integer number (3960699957).

Almost surely, 2^21121154302 is an apocalyptic number.

21121154302 is a deficient number, since it is larger than the sum of its proper divisors (10564445354).

21121154302 is a wasteful number, since it uses less digits than its factorization.

21121154302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289402.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21121154302 its reverse (20345112112), we get a palindrome (41466266414).

The spelling of 21121154302 in words is "twenty-one billion, one hundred twenty-one million, one hundred fifty-four thousand, three hundred two".