2101378228 has 12 divisors (see below), whose sum is σ = 3893730372. Its totient is φ = 988883840.

The previous prime is 2101378163. The next prime is 2101378241. The reversal of 2101378228 is 8228731012.

It can be written as a sum of positive squares in 2 ways, for example, as 1846592784 + 254785444 = 42972^2 + 15962^2 .

It is a super-2 number, since 2×2101378228² = 8831580914224839968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 2101378193 and 2101378202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15451243 + ... + 15451378.

It is an arithmetic number, because the mean of its divisors is an integer number (324477531).

Almost surely, 2^2101378228 is an apocalyptic number.

It is an amenable number.

2101378228 is a deficient number, since it is larger than the sum of its proper divisors (1792352144).

2101378228 is a wasteful number, since it uses less digits than its factorization.

2101378228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30902642 (or 30902640 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 2101378228 is about 45840.7921833818. The cubic root of 2101378228 is about 1280.8592513518.

The spelling of 2101378228 in words is "two billion, one hundred one million, three hundred seventy-eight thousand, two hundred twenty-eight".