2021155312 has 20 divisors (see below), whose sum is σ = 4271987736. Its totient is φ = 918706880.

The previous prime is 2021155309. The next prime is 2021155333. The reversal of 2021155312 is 2135511202.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 2.

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, 5741743 + ... + 5742094.

Almost surely, 2^2021155312 is an apocalyptic number.

2021155312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2021155312 is an abundant number, since it is smaller than the sum of its proper divisors (2250832424).

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

2021155312 is a wasteful number, since it uses less digits than its factorization.

2021155312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11483856 (or 11483850 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2021155312 is about 44957.2609485943. The cubic root of 2021155312 is about 1264.3478152746.

Adding to 2021155312 its reverse (2135511202), we get a palindrome (4156666514).

The spelling of 2021155312 in words is "two billion, twenty-one million, one hundred fifty-five thousand, three hundred twelve".