1021100145 has 64 divisors (see below), whose sum is σ = 1839366144. Its totient is φ = 480372480.

The previous prime is 1021100141. The next prime is 1021100153. The reversal of 1021100145 is 5410011201.

It is a happy number.

1021100145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021100145 - 2² = 1021100141 is a prime.

It is a super-2 number, since 2×1021100145² = 2085291012238042050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (1021100141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 392800 + ... + 395390.

It is an arithmetic number, because the mean of its divisors is an integer number (28740096).

Almost surely, 2^1021100145 is an apocalyptic number.

1021100145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021100145 is a deficient number, since it is larger than the sum of its proper divisors (818265999).

1021100145 is a wasteful number, since it uses less digits than its factorization.

1021100145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1021100145 is about 31954.6576417273. The cubic root of 1021100145 is about 1006.9844850603.

Adding to 1021100145 its reverse (5410011201), we get a palindrome (6431111346).

The spelling of 1021100145 in words is "one billion, twenty-one million, one hundred thousand, one hundred forty-five".