200021211078 has 96 divisors (see below), whose sum is σ = 457288364160. Its totient is φ = 58138629120.

The previous prime is 200021210959. The next prime is 200021211079. The reversal of 200021211078 is 870112120002.

It is a super-2 number, since 2×200021211078² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021211079) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6786193 + ... + 6815603.

It is an arithmetic number, because the mean of its divisors is an integer number (4763420460).

Almost surely, 2^200021211078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200021211078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228644182080).

200021211078 is an abundant number, since it is smaller than the sum of its proper divisors (257267153082).

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

200021211078 is a wasteful number, since it uses less digits than its factorization.

200021211078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29814 (or 29801 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The spelling of 200021211078 in words is "two hundred billion, twenty-one million, two hundred eleven thousand, seventy-eight".