2121781362 has 16 divisors (see below), whose sum is σ = 4244291040. Its totient is φ = 707139072.

The previous prime is 2121781331. The next prime is 2121781381. The reversal of 2121781362 is 2631871212.

It is a super-2 number, since 2×2121781362² = 9003912296261150088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12093 + ... + 66255.

It is an arithmetic number, because the mean of its divisors is an integer number (265268190).

Almost surely, 2^2121781362 is an apocalyptic number.

2121781362 is an abundant number, since it is smaller than the sum of its proper divisors (2122509678).

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

2121781362 is a wasteful number, since it uses less digits than its factorization.

2121781362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60697.

The product of its digits is 8064, while the sum is 33.

The square root of 2121781362 is about 46062.7980261729. The cubic root of 2121781362 is about 1284.9913673611.

The spelling of 2121781362 in words is "two billion, one hundred twenty-one million, seven hundred eighty-one thousand, three hundred sixty-two".