2121630246520 has 32 divisors (see below), whose sum is σ = 4773951328320. Its totient is φ = 848601738880.

The previous prime is 2121630246509. The next prime is 2121630246539. The reversal of 2121630246520 is 256420361212.

It is a super-2 number, since 2×2121630246520² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 887551 + ... + 2242990.

It is an arithmetic number, because the mean of its divisors is an integer number (149185979010).

Almost surely, 2^{2121630246520} is an apocalyptic number.

2121630246520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121630246520 is an abundant number, since it is smaller than the sum of its proper divisors (2652321081800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121630246520 is a wasteful number, since it uses less digits than its factorization.

2121630246520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147495 (or 3147491 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 2121630246520 in words is "two trillion, one hundred twenty-one billion, six hundred thirty million, two hundred forty-six thousand, five hundred twenty".