2121016221384 has 32 divisors (see below), whose sum is σ = 5311730433120. Its totient is φ = 705780089856.

The previous prime is 2121016221349. The next prime is 2121016221413. The reversal of 2121016221384 is 4831226101212.

It is a super-2 number, since 2×2121016221384² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76568194 + ... + 76595889.

It is an arithmetic number, because the mean of its divisors is an integer number (165991576035).

Almost surely, 2^{2121016221384} is an apocalyptic number.

2121016221384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121016221384 is an abundant number, since it is smaller than the sum of its proper divisors (3190714211736).

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

2121016221384 is a wasteful number, since it uses less digits than its factorization.

2121016221384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153164669 (or 153164665 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 2121016221384 in words is "two trillion, one hundred twenty-one billion, sixteen million, two hundred twenty-one thousand, three hundred eighty-four".