1921143011 has 8 divisors (see below), whose sum is σ = 2005864224. Its totient is φ = 1836521280.

The previous prime is 1921142999. The next prime is 1921143061. The reversal of 1921143011 is 1103411291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1921143011 - 2³⁰ = 847401187 is a prime.

It is a super-2 number, since 2×1921143011² = 7381580937428292242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1921143061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16055 + ... + 64031.

It is an arithmetic number, because the mean of its divisors is an integer number (250733028).

Almost surely, 2^1921143011 is an apocalyptic number.

1921143011 is a deficient number, since it is larger than the sum of its proper divisors (84721213).

1921143011 is a wasteful number, since it uses less digits than its factorization.

1921143011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49741.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1921143011 is about 43830.8454287617. The cubic root of 1921143011 is about 1243.1395924086.

The spelling of 1921143011 in words is "one billion, nine hundred twenty-one million, one hundred forty-three thousand, eleven".