1142021101 has 4 divisors (see below), whose sum is σ = 1229868892. Its totient is φ = 1054173312.

The previous prime is 1142021071. The next prime is 1142021107. The reversal of 1142021101 is 1011202411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44689225 + 1097331876 = 6685^2 + 33126^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142021101 - 2¹⁹ = 1141496813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 87847777 = 1142021101 / (1 + 1 + 4 + 2 + 0 + 2 + 1 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142021107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43923876 + ... + 43923901.

It is an arithmetic number, because the mean of its divisors is an integer number (307467223).

Almost surely, 2^1142021101 is an apocalyptic number.

It is an amenable number.

1142021101 is a deficient number, since it is larger than the sum of its proper divisors (87847791).

1142021101 is an equidigital number, since it uses as much as digits as its factorization.

1142021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87847790.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1142021101 is about 33793.8027010871. The cubic root of 1142021101 is about 1045.2609105620.

Adding to 1142021101 its reverse (1011202411), we get a palindrome (2153223512).

The spelling of 1142021101 in words is "one billion, one hundred forty-two million, twenty-one thousand, one hundred one".