21121301746 has 8 divisors (see below), whose sum is σ = 31989544704. Its totient is φ = 10458120180.

The previous prime is 21121301743. The next prime is 21121301771. The reversal of 21121301746 is 64710312112.

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

It is a super-2 number, since 2×21121301746² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121301743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51265090 + ... + 51265501.

It is an arithmetic number, because the mean of its divisors is an integer number (3998693088).

Almost surely, 2^21121301746 is an apocalyptic number.

21121301746 is a deficient number, since it is larger than the sum of its proper divisors (10868242958).

21121301746 is a wasteful number, since it uses less digits than its factorization.

21121301746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102530696.

The product of its (nonzero) digits is 2016, while the sum is 28.

Adding to 21121301746 its reverse (64710312112), we get a palindrome (85831613858).

The spelling of 21121301746 in words is "twenty-one billion, one hundred twenty-one million, three hundred one thousand, seven hundred forty-six".